Title of Invention

A PROCESS FOR MANUFACTURING A PLASTIC PANE WITH EMBEDDED ELECTRICAL CONDUCTS AND A PLASTIC PANE

Abstract The invention discloses a process for manufacturing a plastic pane (1,1;1") embedded electrical conductors (4), in particular a window pane, wherein the conductors are associated with a surface of a plastic sheet (2;2';2") which is subsequently injected from the rear with another plastic layer to form a pane body (3), whereby the material of the plastic sheet and the injected plastic material are directly assembled by adherence with each other, and whereby the surface of the plastic sheet located opposite the conductors from one of the outer faces of the finished pane, the electrical conductors, in accordance with the invention, are formed by filing the surface of the plastic sheet (2; 2'; 2") to be exposed to the rear injection with at least a metal wire (4).
Full Text The invention relates to a process for manufacturing a
plastic pane provided with a structure consisting of
embedded electrical conductors, having the features of
the preamble of claim 1, and also to a corresponding
plastic pane according to the independent claim 14.
In automobile construction, the weight of the bodywork
is constantly being reduced. Thus, for example, glass
panes are being replaced with plastic panes, preferably
made of polycarbonate (PC) or polymethyl methacrylate
(PMMA). There are also already in existence hybrid
composites consisting of glass and plastic panes. In
particular, solutions are being sought to the problem
of also 'replacing glass panes provided with
incorporated heating wires or an antenna with plastic
panes.
Patent US-A-5 525 401 discloses a relevant process and
a vehicle window made of plastic, in which, during
manufacture of said window, an electrically conducting
structure is deposited by screen printing on one
surface of an initially flat thin plastic film. After
the screen-printed pattern, which may also include an
opaque peripheral band in the form of a frame, has
cured, the printed film may be deposited in an
injection-molding mold in which the film may adopt a
curved spatial shape. Thus, its printed face is joined
to a plastic substrate, which is injection-molded in
the mold. In the end product, the conducting structure
is enclosed between the film and the body of the pane
and is protected from any damage.
However, screen-printing pastes that can be applied in
industrial production to plastic surfaces, and which
exhibit good electrical conductivity of the level
needed for heating, are not available on the market.
Furthermore, the conductor structures that can be
produced by conventional screen printing are visually
very apparent if they are compared with the small
thicknesses of the heating wires available.
Application DE-A1-19 927 999 discloses a plastic
laminated pane composed of two relatively thin PC films
located on the outside and of a filling layer (the
"body of the pane"), also made of PC, which joins them
to one another. An electrically conductive coating is
printed on the inner face of one of the two films. To
make an external electrical connection to the
conducting layer, the film in question is penetrated by
an outwardly projecting plug contact, which is in
internal electrical contact with the layer. The outer
faces of both films are provided with scratch-resistant
coatings.
Application DE-A1-3 506 Oil discloses a process for
manufacturing a plastic pane with electrical heating,
in which fine wires are laminated to or pressed into
the surface of a prefabricated pane body and this
surface is then again smoothed by pressing. The
material of the pane body must fully encapsulate the
heating wires. Finally, bonded to both faces of the
approximately 1 mm thick pane body are covering sheets
made of crosslinked polyurethane approximately 0.3 mm
in thickness by means of thermoplastic polyurethane
adhesive layers. The self-healing properties of the
latter layers improve the wear resistance and scratch
resistance of the outer faces of the pane. Thin metal
bands are provided for making electrical contact with
the wires embedded in the core layer.
Application EP-A1-7 857 discloses a transparent
laminated pane provided with an array of electrically
conducting wires, which is essentially laminated to a
rigid pane of glass or plastic (PC or PMMA) and to a
relatively thin laminated preform composed of a
mechanically strong external sheet and an adhesive
thermoplastic intermediate sheet provided with applied
or incorporated wires. The finished laminated pane can
be used mainly as a heated vehicle window. Its external
sheet is preferably made of a heat-curing polyurethane
with a thickness of about 0.5 mm, its surface
exhibiting self-healing properties when exposed to
mechanical action. In contrast, the intermediate sheet
is made of a thermoplastic polyurethane with a
thickness of only about 0.05 mm. The wires are applied
after manufacture of the preform laminated to the free
face of the intermediate sheet. Next, the laminated
preform is joined, by adhesive bonding, to the rigid
glass or plastic (PC or PMMA) pane by calendering and,
optionally, subsequently subjecting it to an autoclave
treatment.
Also known, from patent DE-C2-4 201 620, is a device
for depositing fine wires on a plastic sheet, which is
designed to be inserted into a laminated pane and
which, in particular, itself forms the adhesive sheet
for joining the surfaces of two glass panes together.
Such laminated panes are used in modern vehicles, as
heated windows and/or' antenna-incorporated windows, in
which the wires must each time be electrically
connected to external connectors.
Another case of the application of transparent panes
with embedded wires is disclosed in patent
DE-C2-4 227 032. The window glazing for buildings
described here includes fine parallel metal wires
housed in a multiple-glazing unit, radar radiation
being reflected off said wires. This application
requires no external electrical connector.
The object of the present invention is to disclose
another process for manufacturing a plastic pane with
an embedded conductor structure, and also a plastic
pane that can be manufactured in particular by the
process.
According to the invention, this objective is achieved,
as regards the process, by the features of claim 1. The
features of claim 14 describe a corresponding plastic
pane. The features of the secondary claims,
subordinated to the respective independent claims,
indicate advantageous improvements of the subject
matters.
At least one wire or a plurality of wires are thus
applied directly to such a relatively thin solid
plastic sheet or are integrated into the surface of the
latter, that surface of the sheet which is located on
the opposite side from the wires forming one of the
outer faces, of the finished pane. A conductor structure
according to the present invention may also be produced
by placing an individual wire in a predetermined
arrangement, or alternatively an array of wires, for
example in the form of loops, meandering patterns and
the like. Of course, it is also possible, in order to
produce an array comprising several parallel sections,
to place, on the face of the sheet, firstly a sinuous
wire with curved joining parts located outside or
inside the face of the sheet and then to cut off the
curved joining parts in order thereafter to connect the
ends of the wires via a parallel arrangement by means
of busbars.
That face of the sheet which is furnished with the wire
or wires is then exposed to an injection via the rear,
in a mold, of the substance that will form the pane
body. A separate adhesive layer between the sheet and
the pane body is eliminated. Of course, plastics are
always combined that bond together intimately and
lastingly during injection molding of the pane body.
Preferably, both the sheet and the additional material
for the pane body are made of polycarbonate. However,
the sheet and the pane body may not have to be made of
the same material. It is also possible to use PMMA and
other appropriate materials and optionally combine
them, provided that the materials of the sheet and of
the pane body are compatible, and therefore provided
that they are securely and lastingly bonded to each
other by the injection-molding operation. In the
optimum case, the surface fusing of the substance
injected at the rear with the sheet gives rise to a
practically uniform composite obtained from the sheet
and the pane body.
As in other panes with incorporated wires, the latter
may also, in the panes disclosed here, be used as
resistance heating elements, as antenna conductors, as
conductors for a breakage alarm loop and/or also for
shielding ox decorative purposes.
The area of the surface furnished with wires in the end
product (and therefore either heating or acting as an
antenna) may be freely determined. For example, apart
from placing the wires over the entire surface, it is
possible to furnish only part of the surface of the
sheet with said wires. Furthermore, different
"functional fields" (heating, antenna, etc.) may be
furnished with wires on one and the same sheet, which
wires must not absolutely be electrically connected
together but which may be electrically connected to the
outside separately from one another, according to the
requirements.
It is even possible to employ a sheet area smaller than
the total area of the pane. Said total area is then
determined only by the pane body, which extends at
least on one side beyond the sheet, or else forms a
smooth extension of the outer face of the sheet.
Transitions between the sheet and the pane body in the
outer face of the pane are barely perceptible visually,
even in prototypes, as a result of the fusing of the
material injected hot under high pressure via the rear
with the sheet, in particular also with its cut edge
located in the face. It would also be conceivable to
provide two or more than two sheet portions on one and
the same face of the pane. Where appropriate, the
aforementioned different functional fields may also be
placed on separate sheets, which are joined via the
rear to a common pane body by rear injection molding
and are located in the same outer face, of the finished
pane.
The outline of the sheet portion may be cut virtually
at will, not only with a polygonal shape but also a
round, elliptical or other shape. In principle, a
relatively small sheet portion could be placed in the
middle of the face of the pane. Because of the
necessary electrical connections, it will be preferred
to place at least one part of the surface near the
outer perimeter of the pane, if the connectors do not
have to be located in the face of the pane. It is also
conceivable for an end face, or edge, of the sheet not
to be cut along a smooth line, but for it to be given a
structure, (for example a sawtooth structure,
corrugated structure or irregular structure of the
"broken line" type), if this does not degrade the
smooth surface of the outer face of the sheet, and at
the same time it may serve to camouflage the transition
between it and the pane body.
Furthermore, it is also possible, by the technique
described here, to furnish two covering sheets with
wires and to injection-mold the pane body between said
sheets. In this case, various regions of the surface of
the pane may also be furnished with wires. Such a
heated window, heating on both faces, mounted in
vehicles could, for example, be used both for rapidly
removing fogging on the inner face and for melting ice
on the outer face, the latter aspect being especially
necessary in the region where the windshield wipers are
at rest. Particularly for the latter arrangement, it is
recommended that only a relatively narrow band of sheet
furnished with wires on the outer face of the pane be
provided and subjected to injection molding via the
rear, since in this region of the edge of the pane the
transition from the sheet to the pane body may be
covered, or masked, for example by an opaque colored
frame. The colored frame may be placed on the same face
of the pane as said transition, or else on the opposite
face of the pane, or even, where appropriate, on that
face of the sheet located on the inside. In the latter
embodiment, the material of the colored frame must,
however, be chosen in such a way that it can be joined
without any difficulty to the plastic substance
injection-molded subsequently. Even with a colored
frame terminating precisely at the transition, the
transition is sufficiently masked from the visual
standpoint.
In general, the sheet may be provided, on its face that
will be located later on the inside, with a heat
protection (IR-reflecting) coating, in addition to the
furnishing with wires. If two covering sheets are
provided, one of them may be furnished with wires and
the other may be provided with a heat protection
coating.
To lay the wires, one of the known wire-laying methods
may be used. Preferably, to achieve the desired
arrangement of the wires, a laying head controlled by a
programmed robot is used, which is to be guided above
the face of the sheet and which continuously impresses
or incorporates the wires into the surface of the sheet
with a slight pressure and with application of heat. If
the wires themselves are heated, they then penetrate
easily into the sheet only under very slight pressure.
If a laying head carrying out a spatial movement is
used, the wires may then be laid even on the free,
possibly spherically curved, surface of the sheet,
which is already in the mold. As in the prior art, the
wires may also be laid in straight lines, along arcs or
in the form of corrugations, according to the
requirements of the pattern. The wires available have a
thickness of between 5 and 500 ┬Ám and are of sufficient
mechanical stability. Usually the wires are made of
tungsten, but wires made of other materials may be
used. Because of their small thickness, the wires are
practically imperceptible visually in the mounted
window, the more so as most of the time both light
reflection and light dispersion are minimized by a
suitable coating.
Where appropriate, it is also possible to embed the
wire or wires in the surface of the sheet by making use
of ultrasonic waves; the necessary heat, allowing the
wires to penetrate into the surface of the sheet, is
then provided directly in the material of the sheet.
Given that the sheet in the injection-molding mold is
again heated right into the plastic region of the
material, the wire or wires may be laid on a flat sheet
portion, which is shaped in the mold to its final
surface configuration. As a variant, the sheet portion
could also have already received, thermally-
plastically, its intermediate or final shape before it
is introduced into the injection-molding mold, where
appropriate also before laying the wires.
Likewise, "current-collecting" busbars, with which
several wires placed parallel may be brought into
common electrical contact near the edge of the pane,
must be laid along the surface in question and brought
into conducting contact with the wire or wires before
the injection molding via the rear onto the sheet, as
is well known in the prior art.
If the wires have to be provided with external
connectors, these may be prepared before injection
molding via the rear. Where appropriate, plug-type
connectors may be prepared, in a manner known per se,
which are also embedded during injection molding of the
pane body. They remain accessible from outside, in such
a way that the electrical lines (supply and/or antenna
lines) can be subsequently brought into contact with
the embedded wires by means of plugs.
In a variant, the wire or wires may extend in a
suitable injection-molding mold only on one plane or
curved (convex) face of the sheet, in which case they
extend, at least on one side, over the furnished sheet
surface, and the wires may be fixed by the injected
material of the pane body, in which case they will also
penetrate the surface of the sheet at the latest during
heating of the mold.
The same effect may be obtained when the wire or wires
are introduced while they are being laid on top of that
face of the sheet to be furnished and are temporarily
fixed thereto by other means. For this purpose, it is
possible firstly to cut one face of the sheet larger
than is necessary and later on to remove, by
appropriate means, the excess parts of the sheet that
are unnecessary, without at the same time cutting the
lengths of wire that protrude (free ends, loops). These
options cannot be exercised when patterns are printed
by screen printing.
In particular, but not exclusively in the preceding
cases, the wires may continue toward the outside,
beyond the finished pane (in at least one front edge),
so as to be, where appropriate, connected thereat to
the outside of the face of the pane.
The incorporated or applied wires are in all cases
embedded between the sheet and the rear-injected
material, which results, compared to the known
solutions with wires embedded more on the inside, or
alternatively more deeply embedded, in the laminate,
with the advantage that the wires are in this case very
close to the surface of the thin sheet to be heated.
This thus compensates for the poor thermal conductivity
of the plastics used and satisfactory short heating
times are achieved.
To obtain surface heating as uniform as possible, the
wires are laid at relatively short distances apart.
Thus at the same time the nonuniformities in thermal
elongation of the plastic in the face are minimized.
The sheet may have a thickness of between 0.1 and 1 mm
or more, preferably between 0.2 and 0.7 mm. The
thickness of the pane body will be advantageously
between 1.5 and 8 mm, and where appropriate even more,
depending on the surface area of the end product and
the envisioned application. Its dimensions are
determined by the cavity of the injection-molding mold.
Of course, this same cavity may also be suitable, as is
well known, for direct formation of other window
accessories, for example fixtures, lamps, etc., on the
rear-injection-molded substance or on the pane body.
The free outer faces of the sheet and of the pane body
are usually provided with scratch-resistant coatings;
the sheet may of course be already correspondingly
coated before the wires are laid, preferably when said
sheet extends over the entire outer face of the pane.
Other details and advantages of the subject matter of
the invention will emerge from the drawing of an
illustrative example and from its detailed description
that follows.
In the/drawings, which show in a simplified manner and
without any particular scale, fragments of plastic
panes:
figure 1 illustrates a first embodiment, in
which a covering sheet provided on only face is
furnished with wires oriented so as to be mutually
parallel;
figure 2 shows a second embodiment, in which
two covering sheets are furnished with wires in
different surface portions on either side of the pane
body; and
figure 3 illustrates a third embodiment, in
which one sheet is furnished with wires and a second
sheet is provided with a. heat protection coating.
A plastic pane 1 according to figure 1 is composed
essentially of a thin plastic sheet 2 and a pane body 3
securely and lastingly joined to this sheet by rear
injection molding in a mold. The interface, or
alternatively the join, between the sheet and the pane
body is shown here only for the purpose of
illustration. In the actual product, it is barely
perceptible because the material of the pane body
merges into the face of the sheet during rear injection
molding. Inserted into that surface of the sheet 2
directed toward the join, are a number of fine wires 4
placed parallel to each other at relatively short
distances apart. They are entirely embedded in the
material of the plastic sheet 2, without piercing the
free surface of the latter. The wires 4 are in fact
much thinner than the sheet. The injection-molded
plastic of the pane body 3 erases any unevenness of the
inner face of the sheet. The sheet and the pane body
here have the same surface area. A scratch-resistant
coating is not shown here. This may be applied to the
free face of the sheet before the wires are laid, while
of course on the pane body only after it has
solidified, before or after it has been taken out of
the injection-molding mold.
Once again it should be pointed out that, in the
illustrative examples, admittedly a plurality of wires
is always used, but it is also possible to produce an
array of wires with a single wire, with lengths of wire
that are oriented parallel to one another, as
illustrated.
In the plastic plane 1' shown in figure 2, both faces
of the pane body 3 are provided with sheets 2 and 2' ,
which in turn both have incorporated wires 4. In this
embodiment, the wires 4 are not entirely embedded in
the material of the sheets but in the "join" between
the sheets and the pane body formed by injection
molding they penetrate slightly into the latter.
Furthermore, the sheet 2' is of smaller area than the
total area of the pane, so that, at a transition 5, the
surface of the pane body 3 forms a flat join with the
surface of the sheet 2'. On the other face of the pane
1', the complete sheet 2 is furnished with wires only
over part of its inner face. On its outer face, it is
provided with an opaque coating 6 in that region in
which the transition 5 lies and in which those faces of
the sheet that are furnished with wires overlap. The
coating 6 thus visually masks these regions in the
direction of through-vision.
If such a pane is employed in a vehicle, for example as
a rear window, the smaller sheet 2 ' may then be placed
on the face located to the outside in the fitted state,
where its wires 4 will be used as a heating field for
deicing the rest area for the windshield wipers. At the
same time, the wires 4 of the sheet 2 located inside
form the usual surface heating for defogging the inner
face of the same pane. The heating fields obtained are
formed each time near the surface to be selectively
heated, so as to ensure that the surfaces of the pane
are rapidly heated.
In a third embodiment, figure 3 shows the same
combination of the pane body 3 and a sheet 2' furnished
with wires 4 (as in figure 2) but with a second
covering sheet 2" which is coated, in a known manner,
with a transparent coating 7 over the entire surface,
protecting it from heat, in particular reflecting the
infrared radiation, on its face turned toward the pane
body. The latter may have not only the aforementioned
passive function, but also, as is known, may be
employed as surface heating.
In all the illustrative examples, external connectors
according to the known prior art may be provided, at
the point where they are needed. It is unnecessary to
go into further details regarding this because the
corresponding means may be regarded as known.
WE CLAIM
1. A process for manufacturing a plastic pane with embedded electrical
conductors, in particular a window pane, in which the conductors are
joined to a surface of a plastic sheet, which subsequently receives, by
injection molding via the rear, another layer of plastic for forming a pane
body, in which process the material of the sheet and the injected plastic
are directly joined together physically, and in which that surface of the
plastic sheet which is located on the opposite side from the conductors
forms one of the outer faces of the finished pane, characterized in that
the electrical conductors are formed by providing at least one metal wire
to that surface of the plastic sheet which is to be exposed to the rear
injection molding.
2. The process as claimed in claim 1, wherein the wire or wires are at least
partly impressed into the surface of the plastic sheet by the action of heat.
3. The process as claimed in claim 1 or 2, wherein the wire or wires are
applied to or extended over the surface of the plastic sheet in the
injection-molding mold.
4. The process as claimed in any one of the preceding claims, wherein a
thermoplastic sheet with a thickness of between 0.1 and 1 mm is adapted.
5. The process as claimed in any one of the preceding claims, wherein a
thermoplastic sheet made of polycarbonate (PC) or polymethyl
methacrylate (PMMA) is adapted.
6. The process as claimed in any one of the preceding claim, wherein the
plastic sheet (2,2',2") is provided with a scratch-resistant coating before
said sheet is placed in the injection-molding mold.
7. The process as claimed in any one of the preceding claims, wherein the
wire or wires (4) emerge into the outside via at least one edge of the
pane (1).
8. The process as claimed in any one of the preceding claims, wherein
contact elements for making external electrical connections for the wire or
wires are embedded in the plastic during injection molding, via the rear,
onto the plastic sheet.
9. The process as claimed in any one of the preceding claims, wherein
busbars are deposited on the plastic sheet before the injection molding via
the rear, for producing external electrical connections for the deposited
wires, and are electrically connected to the wires.
10.The process as claimed in claim 8 or 9, wherein plug-connectors, as
contact elements, are embedded with the plastic by injection molding, in
such a way that they are accessible on the outer face of the finished
plastic pane in order for connection lines to be plugged in.
11.The process as claimed in any one of the preceding claims, wherein the
plastic sheet is of smaller area than the total area of the pane, in such a
way that, during injection molding via the rear, the injected material is
injected onto the wall of the mold alongside the plastic sheet and forms a
smooth extension of the outer face of the plastic sheet.
12.The process as claimed in any one of the preceding claims, wherein the
plastic sheet is provided with wires only on one part of the area of its
surface.
13.The process as claimed in any one of the preceding claims, wherein wires
provided as resistance heating elements are deposited on the plastic sheet
mutually separated by distance of at most 20 mm, preferably at most 10
mm.
14. A plastic pane (1, 1', 1") comprising a pane body (3), which is physically
joined, by rear injection molding to a thin plastic sheet (2, 2', 2") that is
provided with an electrical conductor structure on one face, that surface
of which, located on the opposite side from the conductor structure, forms
one of the outer faces of the pane, characterized in that the electrical
conductor structure is formed by at least one metal wire (4) laid on or in
that surface of the plastic sheet (2,2', 2") which is subjected to the
injections molding via the rear.
15.The plastic pane as claimed in claim 14, wherein the plastic sheet (2') is of
smaller area than the total area of the pane and in that the outer face of
the sheet becomes, in a smooth manner, the outer face of the pane body
(3) in a transition (5).
16.The plastic pane as claimed in claim 14 or 15, wherein only part of the
surface of the plastic sheet (2) is provided with wires.
17.The plastic pane as claimed in any one of the preceding claims, wherein
another plastic sheet (2', 2") is provided on the second face of the pane
body (3).
18.The plastic pane as claimed in claim 17, wherein the other plastic sheet
(2') is provided with wires (4) over at least part of the area of its surface.
19.The plastic pane as claimed in any one of the preceding claims,
comprising several plastic sheets provided with wire (4), on one or both
its faces, the respective conductor structure forming separate electrical
functional elements.
20.The plastic pane as claimed in any one of the preceding claims, wherein at
least one plastic sheet (2") is provided with a transparent heat protection
coating (7).
21.The plastic pane as claimed in any one of the preceding claims, wherein
its free faces are provided with a scratch-resistant coating.
22.The plastic pane as claimed in any one of the preceding claims, wherein
its face is covered at least partly with an opaque colored layer (6) in the
direction of through-vision.
23.The plastic pane as claimed in any one of the preceding claims, wherein
an opaque frame is provided along the edge of the face of the pane,
which frame is composed of a colored layer (6) and/or of a separate
shaped piece joined to the face of the pane.
24.The plastic pane as claimed in any one of the preceding claims, wherein a
transition (5), located in its outer face, between a sheet (2') and the pane
body (3) is masked or covered, in the direction of through-vision, by an
opaque colored layer (6) and/or by a frame.
25.The plastic pane as claimed in claims 22,23 or 24, wherein the torque
colored layer is placed on that surface of the plastic sheet which is
furnished with wire and located on the inside.

The invention discloses a process for manufacturing a plastic pane (1,1;1")
embedded electrical conductors (4), in particular a window pane, wherein the
conductors are associated with a surface of a plastic sheet (2;2';2") which is
subsequently injected from the rear with another plastic layer to form a pane
body (3), whereby the material of the plastic sheet and the injected plastic
material are directly assembled by adherence with each other, and whereby the
surface of the plastic sheet located opposite the conductors from one of the
outer faces of the finished pane, the electrical conductors, in accordance with the
invention, are formed by filing the surface of the plastic sheet (2; 2'; 2") to be
exposed to the rear injection with at least a metal wire (4).

Documents:

387-kolnp-2004-abstract.pdf

387-kolnp-2004-claims.pdf

387-kolnp-2004-correspondence.pdf

387-kolnp-2004-description (complete).pdf

387-kolnp-2004-drawings.pdf

387-kolnp-2004-examination report.pdf

387-kolnp-2004-form 1.pdf

387-kolnp-2004-form 18.pdf

387-kolnp-2004-form 2.pdf

387-kolnp-2004-form 26.pdf

387-KOLNP-2004-FORM 27-1.1.pdf

387-KOLNP-2004-FORM 27.pdf

387-kolnp-2004-form 3.pdf

387-kolnp-2004-form 5.pdf

387-KOLNP-2004-FORM-27.pdf

387-kolnp-2004-granted-abstract.pdf

387-kolnp-2004-granted-claims.pdf

387-kolnp-2004-granted-correspondence.pdf

387-kolnp-2004-granted-description (complete).pdf

387-kolnp-2004-granted-drawings.pdf

387-kolnp-2004-granted-examination report.pdf

387-kolnp-2004-granted-form 1.pdf

387-kolnp-2004-granted-form 18.pdf

387-kolnp-2004-granted-form 2.pdf

387-kolnp-2004-granted-form 26.pdf

387-kolnp-2004-granted-form 3.pdf

387-kolnp-2004-granted-form 5.pdf

387-kolnp-2004-granted-reply to examination report.pdf

387-kolnp-2004-granted-specification.pdf

387-kolnp-2004-granted-translated copy of priority document.pdf

387-kolnp-2004-reply to examination report.pdf

387-kolnp-2004-specification.pdf

387-kolnp-2004-translated copy of priority document.pdf


Patent Number 235853
Indian Patent Application Number 387/KOLNP/2004
PG Journal Number 36/2009
Publication Date 04-Sep-2009
Grant Date 02-Sep-2009
Date of Filing 23-Mar-2004
Name of Patentee FREEGLASS GMBH & CO. KG.
Applicant Address SCHEFENACKER-STRASSE 1, 71409 SCHWAIKHEIM
Inventors:
# Inventor's Name Inventor's Address
1 BLANCHE LUC-HENRY LERCHENSTRASSE 27/1 71409 SCHWAIKHEIM
2 AENGENHEYSTER GERALD AGNES-MIEGEL-STRASSE 9 71642 LUDWIGSBURG
3 BLANCHE LUC-HENRY LERCHENSTRASSE 27/1 71409 SCHWAIKHEIM
4 AENGENHEYSTER GERALD AGNES-MIEGEL-STRASSE 9 71642 LUDWIGSBURG
PCT International Classification Number B29C 45/14
PCT International Application Number PCT/FR2002/03266
PCT International Filing date 2002-09-25
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10147537.3 2001-09-26 Germany