Title of Invention

CARBON BLACK.

Abstract A carbon black having attached thereto at least one organic group selected from the group consisting of an N-(4-thiocyanate alkyl)succinimide, N-(4- thiocyanate aryl) succinimide, N-(4-thiocyanate alkyl)amide and N-(4- thiocyanate aryl)amide group.
Full Text

Carbon black
The invention concerns a carbon black, a process for its
production and its use.
Carbon blacks having organic groups are known from DE
10012783, wherein the organic group contains at least one
substituted C-C single or double bond, is linked to the
carbon black by means of the two carbon atoms in the C-C
single or double bond and at least one carbon atom in the
C-C single or double bond contains at least one activating
substituent.
A process for the surface modification of carbon-containing
material having aromatic groups by electrochemical
reduction of a diazonium salt is known from EP 0569503.
The furnishing of carbon black with organic groups by
linking the organic groups to the carbon-containing
material by diazotisation (WO 96/18690) or by bonding the
organic groups to the carbon black by means of reactions
with radical formers (Ohkita K., Tsubokawa N., Saitoh E.,
Carbon 16 (1978) 41, DE 10012784.3) is also known.
A disadvantage of the known carbon blacks is that when
surface-modified carbon blacks are used in rubber
compounds, the hysteresis (correlated with rolling
resistance) and/or the dynamic rigidity (correlated with
handling properties) deteriorates.
The object of the present invention is to provide a carbon
black that in a rubber compound has a higher or an equal
dynamic rigidity (E* 60°C) combined with reduced hysteresis
(tan δ 60°C).

The invention provides a carbon black having organic
groups, which is characterised in that the organic group
contains a thiocyanate group.
In a preferred embodiment the organic group can be a
thiocyanate alkyl or thiocyanate aryl group, preferably an
N-(4-thiocyanate alkyl)succinimide, N-(4-thiocyanate
aryl)succinimide, N-(4-thiocyanate alkyl)amide or N-(4-
thiocyanate aryl)amide group, particularly preferably an N-
(4-thiocyanatophenyl)succinimide or N-(4-
thiocyanatophenyl)amide group. The alkyl group can be a
divalent branched or unbranched, saturated or unsaturated
hydrocarbon having 1 to 20 C atoms. The aryl group can be a
phenyl or naphthyl group.
The invention also provides a process for the production of
the carbon black having organic groups according to the
invention, which is characterised in that carbon black is
reacted with organic compounds containing a C-C double or
triple bond, which is not part of an aromatic system, whose
C-C double or triple bond is activated by at least one
substituent, and the organic compound contains at least one
thiocyanate group.
Activating substituents can be acceptor substituents.
Acceptor substituents can be -COOR, -CO-R, -CN, -SO2R,
-SO2OR, -CO-X-CO- where R = H, -NH-R1, alkyl, aryl or
functionalised alkyl or aryl, X = 0 or N-R1, R1 = alkyl, Y-
functionalised alkyl, polymers, cyclic organic groups, aryl
or Y-functionalised aryl in the form Ar-Yn (n=l-5), Y =
-OH, -SH, -SO3H, -SO3M, -B(0H)2, -0(CH2-CH2-O)nH, -COOH,
-NH2, -NR2, -N((CH2-CH2-O)nH)2, CON((CH2-CH2-O)nH)2,
trialkoxysilyl, perfluoroalkyl, R1, -NH3+, -NR3+, -SO2-NR2,
-N02, -Cl, -CO-NR2, -SS- or -SCN, M = metal, for example
alkali+ or alkaline-earth++, or NRV where R2=H, alkyl or
aryl.

In a preferred embodiment the organic compound can contain
a thiocyanate alkyl or thiocyanate aryl group, preferably
an N-(4-thiocyanate alkyl)succinimide, N-(4-thiocyanate
aryl)succinimide, N-(4-thiocyanate alkyl)amide or N-(4-
thiocyanate aryl)amide group, particularly preferably an N-
(4-thiocyanatophenyl)succinimide or N-(4-
thiocyanatophenyl)amide group.
The carbon blacks having organic groups according to the
invention can be produced by reacting the starting carbon
blacks with N-(4-thiocyanatophenyl) maleic acid imide or N-
(4-thiocyanatophenyl) maleic acid amide. One possible
reaction mechanism could be:

N-(4-thiocyanatophenyl) maleic acid imide and N-(4-
thiocyanatophenyl) maleic acid amide can be produced from
maleic anhydride and thiocyanatoaniline.
Furnace black, gas black, channel black, lamp black,
thermal black, acetylene black, plasma black, inversion
blacks, known from DE 195 21 565 and DE 19839925, Si-
containing carbon blacks, known from WO 98/45361 or DE
19613796, or metal-containing carbon blacks, known from WO
98/42778, arc black and carbon blacks that are secondary
products of chemical production processes can be used as
starting carbon blacks. The carbon black can be activated
by preliminary reactions, by oxidation for example.
Coloured carbon blacks can be used. Other carbon blacks can
be: conductive carbon black, carbon black for UV
stabilisation, carbon black as a filler in systems other

than rubber, for example in bitumen, plastics, carbon black
as a reducing agent, in metallurgy.
Another process for the production of the carbon black
having organic groups according to the invention is
characterised in that carbon black is reacted with a
diazonium salt and the diazonium salt contains a
thiocyanate group.
The diazonium. salt can be produced by reacting a primary
amine with sodium nitrite, preferably in acid solution. 4-
Thiocyanatoaniline, for example, can be used as the primary
amine.
The invention also provides a rubber compound that is
characterised in that it contains a rubber or a blend of
rubbers and the carbon black having organic compounds
according to the invention.
Natural rubber and/or synthetic rubbers can be used as the
rubber. Preferred synthetic rubbers are described for
example in W. Hofmann, Kautschuktechnologie, Genter Verlag,
Stuttgart 1980. They can include, inter alia,
polybutadiene (BR)
polyisoprene (IR)
styrene/butadiene copolymers having styrene contents of
1 to 60, preferably 5 to 50 wt.% (SBR)
isobutylene/isoprene copolymers (IIR)
butadiene/acrylonitrile copolymers having acrylonitrile
contents of 5 to 60, preferably 10 to 50 wt.% (NBR)
ethylene/propylene/diene copolymers (EPDM)
and blends of these rubbers.
In a preferred, embodiment the rubbers can be capable of
vulcanisation with sulfur.

The rubber compounds can contain 10 to 150 parts by weight
of carbon black having organic groups, the parts by weight
relating to 100 parts by weight of rubber.
The rubber compounds can contain organosilanes in a
quantity of 0.1 to 15 wt.%, relative to the quantity of
filler used. Alkyl silanes, for example octyl
trimethoxysilane, hexadecyl trimethoxysilane, octadecyl
trimethoxysilane, propyl triethoxysilane or octyl
triethoxysilane, or organopolysulfane silanes, for example
bis-(triethoxysilylpropyl)tetrasulfane or bis-
(triethoxysilylpropyl)disulfane, can be used as
organosilanes.
The rubber compounds according to the invention can contain
other known rubber auxiliary substances, such as e.g.
crosslinking agents, vulcanisation accelerators, reaction
accelerators, reaction retarders, antioxidants,
stabilisers, processing aids, plasticisers, waxes, metal
oxides and activators, such as triethanolamine,
polyethylene glycol or hexanetriol.
The rubber auxiliary substances can be used in conventional
quantities, which are governed inter alia by the intended
application. Conventional quantities are for example
quantities of 0.1 to 50 wt.%, relative to rubber.
Sulfur or organic sulfur donors can be used as crosslinking
agents.
The rubber compounds according to the invention can also
contain vulcanisation accelerators. Examples of suitable
vulcanisation accelerators are mercaptobenzothiazoles,
sulfenamides, guanidines, thiurams, dithiocarbamates, thio
ureas and thiocarbonates. The vulcanisation accelerators
and sulfur can be used in quantities of 0.1 to 10 wt.%,
preferably 0.1 to 5 wt.%, relative to the rubber used.

The invention also provides a process for the production of
the rubber compounds according to the invention, which is
characterised in that the rubber or the blend of rubbers
and the carbon black having organic groups according to the
invention are mixed in a mixer.
Mixing of the rubbers with the carbon black having organic
groups according to the invention, optionally rubber
auxiliary substances and organosilanes can be performed in
conventional mixers, such as rolls, internal mixers and
compounding extruders. Such rubber compounds can
conventionally be produced in internal mixers, the rubbers,
the filler and the rubber auxiliary substances being first
mixed together in one or more successive thermomechanical
mixing stages at 100 to 170°C. The sequence and time of
addition of the individual components can have a decisive
influence on the properties of the compound obtained. The
crosslinking chemicals can conventionally be added to the
rubber compound thus obtained in an internal mixer or on a
roll at 40-110°C and the compound processed into the so-
called raw compound for the subsequent processing steps,
such as moulding and vulcanisation, for example.
Vulcanisation of the rubber compounds according to the
invention can take place at temperatures of 80 to 200°C,
preferably 130 to 180°C, optionally under a pressure of 10
to 200 bar.
The rubber compounds according to the invention can be used
for the production of moulded articles, for example for the
production of pneumatic tyres, tyre treads, cable sheaths,
tubes, drive belts, conveyor belts, roll coverings, tyres,
shoe soles, sealing rings, profiles and damping elements.
The invention also provides moulded articles obtainable
from the rubber compound according to the invention by
vulcanisation.

The rubber compounds according to the invention have the
advantage that the dynamic rigidity is the same or higher
(equal or better handling properties) and at the same time
the loss factor at 60°C (hysteresis) is reduced (lower
rolling resistance) in comparison to a rubber compound
containing the unmodified starting carbon black.

Example 1:
Production of the carbon black having organic groups
according to the invention by reacting N-(4-
thiocyanatophenyl) maleic acid amide with carbon black in a
dry mix.
500 g of carbon black N 220 and 100 g of N-(4-
thiocyanatophenyl) maleic acid amide are mixed for 5
minutes in a mixer and then conditioned for 5 hours in a
muffle furnace at 180°C. On completion of conditioning the
carbon black, in ten portions, is suspended in 1 1 of
acetone per portion, extracted, washed with acetone and
dried.
After the reaction the product is pulverised by grinding.
Conversion: 70% (relative to the N-(4-thiocyanatophenyl)
maleic acid amide used)
Example 2:
Production of the carbon black having organic groups
according to the invention by reacting N-(4-
thiocyanatophenyl) maleic acid amide with carbon black in
solution
500 g of carbon black N 220 are suspended in a solution of
34 g of maleic acid amide of 4-thiocyanatoaniline in 10 1
of acetone. The solvent is then removed by distillation.
The remaining carbon black-reagent blend is conditioned for
5 hours in a muffle furnace at 180°C. On completion of
conditioning the carbon black, in ten portions, is
suspended in 1 1 of acetone per portion, extracted, washed
with acetone and dried.
After the reaction the product is pulverised by grinding.

Conversion: 82% (relative to the N-(4-thiocyanatophenyl)
maleic acid amide used)
Example 3:
Production of the carbon black having organic groups
according to the invention by reacting N-(4-
thiocyanatophenyl) maleic acid amide with carbon black in
solution
500 g of carbon black N 220 are suspended in a solution of
67 g of maleic acid amide of 4-thiocyanatoaniline in 10 1
of acetone. The solvent is then removed by distillation.
The remaining carbon black-reagent blend is conditioned for
5 hours in a muffle furnace at 180CC. On completion of
conditioning the carbon black, in ten portions, is
suspended in 1 1 of acetone per portion, extracted, washed
with acetone and dried.
After the reaction the product is pulverised by grinding.
Conversion: 87% (relative to the N-(4-thiocyanatophenyl)
maleic acid amide used)
Example 4:
Production of the carbon black having organic groups
according to the invention by reacting N-(4-
thiocyanatophenyl) maleic acid amide with carbon black in
solution
500 g of carbon black N 220 are suspended in a solution of
100 g of maleic acid amide of 4-thiocyanatoaniline in 10 1
of acetone. The solvent is then removed by distillation.
The remaining carbon black-reagent blend is conditioned for
5 hours in a muffle furnace at 180°C. On completion of
conditioning the carbon black, in ten portions, is

suspended in 1 1 of acetone per portion, extracted, washed
with acetone and dried.
After the reaction the product is pulverised by grinding.
Conversion: 70 % (relative to the N-(4-thiocyanatophenyl)
maleic acid amide used)
Comparative example 1:
Production of OH-surface-modified carbon black in solution
according to DE 10012783
500 g of carbon black N 220 are suspended in a solution of
100 g of maleic acid amide of 4-hydroxyaniline in 10 1 of
acetone. The solvent is then removed by distillation. The
remaining carbon black-reagent blend is conditioned for 5
hours in a muffle furnace at 180°C. On completion of
conditioning the carbon black, in ten portions, is
suspended in 1 1 of acetone per portion, extracted, washed
with acetone and dried.
After the reaction the product is pulverised by grinding.
Conversion: 70 %
Comparative example 2:
Production of surface-modified carbon black by reacting N-
(4-sulfamoylphenyl) maleic acid amide with carbon black
according to DE 10012783 in a dry mix
500 g of N 220 and 70 g of N-(4-sulfamoylphenyl) maleic
acid amide are mixed in a mixer for 5 minutes and then
conditioned for 5 hours at 180°C. After the reaction the
product is pulverised by grinding.

Conversion: (relative to the N-(4-sulfamoylphenyl) maleic
acid amide used) 59 %
Example 5:
Rubber compounds
The formulation used for the rubber compounds is shown in
Table 1. The unit phr denotes parts by weight relative to
100 parts of the crude rubber used. The general process for
the production of rubber compounds and vulcanisates thereof
is described in the following book: "Rubber Technology
Handbook", W. Hofmann, Hanser Verlag 1994.


The polymer Buna SBR 1500 is an emulsion-polymerised SBR
copolymer from Buna SOW Leuna Olefinverbund GmbH having a
styrene content of 23.5 % and a viscosity ML(1+4) 100°C of
50.
Edenor ST1 GS from Caldic Deutschland GmbH is used as
stearic acid and Protektor G3108 is a wax produced by
Paramelt B.V.. Vulkacit CZ (CBS) is a commercial product
from Bayer AG.
Carbon black NT 220 is an ASTM carbon black and is produced
by Degussa AG as Corax N 220.
The rubber compounds are produced in an internal mixer
according to the mixing instructions in Table 2.









The rubber compound according to the invention displays a
markedly higher Dmax-Dmin value in comparison to the
reference blends. Whilst the rubber compound according to
the invention has a comparable modulus level at 300%
elongation, the modulus at 100% elongation is markedly
higher in comparison to the reference blends. This then
also explains the higher dynamic rigidity E*. The tan8 60°C
value is reduced in the rubber compound according to the
invention (improved rolling resistance).
The effect becomes even clearer in RPA measurement (Figures
1 to 4). Whilst the comparative blends and the blend
according to the invention display identical behaviour in
the raw compound (Table 5), in terms of both G* (Figure 1)
and tan8 (Figure 2), the behaviour changes after
vulcanisation (Figures 3 + 4 / Table 6). In the vulcanisate
the rubber compounds according to the invention are
characterised in that they have a higher Payne effect and a
lower tanδ value with small deflections.


Description of the RPA test method:
The RPA data is measured with a rubber process analyser
(RPA) supplied by alpha-technologies (deformation type:
shear torsion, temperature: 60°C, frequency: 1.6 Hz,
dynamic shear amplitude: 0.28% - 42%, 15 measuring points
in ascending order distributed equidistantly along the
logarithmic scale of shear amplitude). Plotting the dynamic
shear modulus as a function of amplitude in the above
amplitude range describes the Payne effect.
The measuring principle is described in J. Frohlich and
H.D. Luginsland, Rubber World, Vol. 224, No. 1, p.28ff.
Procedure:
The amplitude sweep defined above is applied to a raw
compound sample from the last productive step in each case
in the RPA at 60°C. The dynamic modulus G*RC and the loss
factor tanSRC as a function of the shear amplitude are
obtained as the measurement results. The actual Payne
effect can be calculated as delta G*RC := G*RC@0.28% -
G*RC@42%. G*RC and tan8RC at various amplitudes between 0.28%
and 42% and delta_G*RC represent the RPA data for the raw
compound.
In an additional measurement, a new raw compound sample
from the last productive step in each case is first
vulcanised in the RPA at a vulcanisation temperature T_vulc
for a vulcanisation time of t_vulc. Immediately thereafter,
the sample vulcanised in this way is cooled in the RPA
without opening the measuring chamber with the aid of
compressed air (room temperature) until the measuring
temperature of 60oC has been reached and stabilised.
Depending on the vulcanisation temperature and the sample
used, this process takes a few minutes - typically around 2
to 5 minutes - and is performed automatically by the RPA.
Immediately thereafter, without opening the measuring
chamber in the meantime, an amplitude sweep as defined

above is applied to this vulcanised sample in the RPA at
60°C. The dynamic modulus G*v and the loss factor tanδv as
a function of the shear amplitude are obtained as the
measuring results. The actual Payne effect can then be
calculated as delta G*v := G*v@0.28% - G*v@42%. G*v and
tanSv at various amplitudes between 0.28% and 42% and
delta_G*v then represent the RPA data for the vulcanisate.
Example 6:
Rubber compounds
The formulation used for the rubber compounds is shown in
Table 7.









The rubber compounds according to the invention display a
markedly higher Dmax-Dmin value, modulus at low elongations
and dynamic modulus (E* 60°C) in comparison to the
reference blend. The tanδ 60°C is reduced (lower rolling
resistance) in comparison to the reference blend.
Example 7:
Rubber compounds
The formulation used for the rubber compounds is shown in
Table 10.


The polymer VSL 5025-1 is a solution-polymerised SBR
copolymer from Bayer AG with a styrene content of 25 wt.%
and a butadiene content of 75 wt.%. The copolymer contains
37.5 phr oil and has a Mooney viscosity (ML l+4/100°C) of
50 ±4.
The polymer Buna CB 24 is a cis-1,4-polybutadiene
(neodymium type) from Bayer AG with a cis-1,4 content of
97 %, a trans-1,4 content of 2 % and a 1,2-content of 1 %.
Naftolen ZD from Chemetall is used as aromatic oil;
Vulkanox 4020 is a 6PPD from Bayer AG.









The rubber compounds according to the invention display a
markedly higher Dmax-Dmin value, dynamic modulus (E* 60°C)
and a higher or equal modulus, at low elongations in
comparison to the reference blend. The tanδ 60°C is reduced
(lower rolling resistance) in comparison to the reference
blend.
Example 8:
Rubber compounds
The formulation used for the rubber compounds is shown in
Table 13.


The natural rubber is an SMR 10 (from Malaysia, ML(1+4)
100°C = 60-70).
Vulkanox HS/LG is a TMQ from Rhein-Chemie GmbH Mannheim.
Rhenogran TBBS-80 is an 80 % N-tert.-butyl-2-benzothiazole
sulfenamide accelerator from Rhein-Chemie GmbH Mannheim.
The rubber compounds are produced in an internal mixer
according to the mixing instructions in Table 14.







The rubber compounds according to the invention display a
markedly higher Dmax-Dmin value, dynamic modulus (E* 60°C)
and modulus at low elongations in comparison to the
reference blend. The tanδ 60°C is reduced (lower rolling
resistance) in comparison to the reference blend.

WE CLAIM:
1. A carbon black having attached thereto at least one organic group
selected from the group consisting of an N-(4-thiocyanate
alkyl)succinimide, N-(4-thiocyanate aryl)succinimide, N-(4-thiocyanate
alkyl)amide and N-(4-thiocyanate aryl)amide group.
2. Carbon black having organic groups as claimed in claim 1, wherein
the organic group an N-(4-thiocyanate alkyl)succinimide, N-(4-
thiocyanate aryl)succinimide, N-(4-thiocyanate alkyl)amide or N-(4-
thiocyanate aryl)amide group.
3. Carbon black having organic groups as claimed in claim 1, wherein
the organic group is an N-(4-thiocyanatophenyl) succinimide or N-(4-
thiocyanatophenyl)amide group.
4. A process for the production of a carbon black as claimed in claim 1,
comprising reacting carbon black with an organic compound containing
an organic group which is a member selected from the group consisting
of an N-(4-thiocyanate alkyl)succinimide, N-(4-thiocyanate
aryl)succinimide, N-(4-thiocyanate alkyl)amide and N-(4-thiocyanate
aryl)amide group.
5. Process for the production of a carbon black as claimed in claim 1,
wherein the carbon black is reacted with a diazonium salt and the
diazonium salt contains a thiocyanate group.
6. Rubber compound, wherein it contains a rubber or a blend of rubbers
and a carbon black having organic groups as claimed in claim 1.

7. Rubber compounds as claimed in claim 6, wherein the carbon black
having organic groups is used in a quantity of 10 to 150 parts by weight,
the parts by weight relating to 100 parts by weight of rubber.
8. Process for the production of rubber compounds as claimed in claim 6,
wherein the rubber or the blend of rubbers and the carbon black with
organic groups are mixed in a mixer.
9. Rubber compound as claimed in claim 6, wherein the dynamic rigidity
and the loss factor tan8 at 60°C are improved in comparison to a rubber
compound containing the unmodified starting carbon black.



ABSTRACT


Title: Carbon black
A carbon black having attached thereto at least one organic group selected
from the group consisting of an N-(4-thiocyanate alkyl)succinimide, N-(4-
thiocyanate aryl) succinimide, N-(4-thiocyanate alkyl)amide and N-(4-
thiocyanate aryl)amide group.

Documents:

459-KOL-2004-(14-05-2013)-CORRESPONDENCE.pdf

459-KOL-2004-(19-08-2011)-FORM-6.pdf

459-KOL-2004-(21-04-2010)-FORM-13-1.1.pdf

459-KOL-2004-(21-04-2010)-FORM-13-1.2.pdf

459-KOL-2004-(21-04-2010)-FORM-13.pdf

459-kol-2004-abstract.pdf

459-KOL-2004-ASSIGNMENT.pdf

459-KOL-2004-CANCELLED PAGES.pdf

459-kol-2004-claims.pdf

459-KOL-2004-CORRESPONDENCE 1.1.pdf

459-KOL-2004-CORRESPONDENCE-1.2.pdf

459-kol-2004-correspondence.pdf

459-kol-2004-description (complete).pdf

459-kol-2004-drawings.pdf

459-kol-2004-examination report.pdf

459-KOL-2004-FORM 1-1.2.pdf

459-KOL-2004-FORM 1.1.1.pdf

459-kol-2004-form 1.pdf

459-KOL-2004-FORM 13.pdf

459-kol-2004-form 18.pdf

459-KOL-2004-FORM 2-1.2.pdf

459-KOL-2004-FORM 2.1.1.pdf

459-kol-2004-form 2.pdf

459-KOL-2004-FORM 3-1.2.pdf

459-KOL-2004-FORM 3.1.1.pdf

459-kol-2004-form 3.pdf

459-KOL-2004-FORM 5-1.2.pdf

459-KOL-2004-FORM 5.1.1.pdf

459-kol-2004-form 5.pdf

459-KOL-2004-FORM 6.pdf

459-kol-2004-gpa.pdf

459-KOL-2004-GRANTED-ABSTRACT.pdf

459-KOL-2004-GRANTED-CLAIMS.pdf

459-KOL-2004-GRANTED-DESCRIPTION (COMPLETE).pdf

459-KOL-2004-GRANTED-DRAWINGS.pdf

459-KOL-2004-GRANTED-FORM 1.pdf

459-KOL-2004-GRANTED-FORM 2.pdf

459-KOL-2004-GRANTED-FORM 3.pdf

459-KOL-2004-GRANTED-FORM 5.pdf

459-KOL-2004-GRANTED-SPECIFICATION-COMPLETE.pdf

459-KOL-2004-OTHER PATENT DOCUMENT.pdf

459-KOL-2004-OTHERS.pdf

459-KOL-2004-PA-1.1.pdf

459-KOL-2004-PA.pdf

459-KOL-2004-PETITION UNDER RULE 137.pdf

459-KOL-2004-REPLY TO EXAMINATION REPORT.pdf

459-kol-2004-specification.pdf

459-KOL-2004-TRANSLATED COPY OF PRIORITY DOCUMENT.pdf


Patent Number 258725
Indian Patent Application Number 459/KOL/2004
PG Journal Number 06/2014
Publication Date 07-Feb-2014
Grant Date 03-Feb-2014
Date of Filing 03-Aug-2004
Name of Patentee EVONIK CARBON BLACK GMBH
Applicant Address RODENBACHER CHAUSSEE 4,63457,HANAU, GERMANY
Inventors:
# Inventor's Name Inventor's Address
1 DR. WERNER NIEDERMEIER GARTENSTRASSE 24, DE-50321 BRUHL PROFESSION,DIPLOM-PHYSICIST, CITIZENSHIP
2 DR. JOACHIM FROHLICH ST. JOSEFS-WEG 34, DE-53332 BORNHEIM PROFESSION, PHYSICIST, CITIZENSHIP
3 DR.KLAUS BERGEMANN ERFTSTRASSE 107, DE-50170 KERPEN-SINDORF PROFESSION, DIPLOM-CHEMIST, CITIZENSHIP
4 DR. EGON FANGHANEL ALBRECHT-DURER-STRASSE 6, DE-06114 HALLE
5 DR. BERND KNACKFUSS ERDMANNSTRASSE 8, DE-04229 LEIPZIG PROFESSION, DIPLOM-CHEMIST, CITIZENSHIP
6 DR. THOMAS LUTHGE KAROLINENSTRASSE 8, DE-63452 HANAU PROFESSION, CHEMIST,
PCT International Classification Number C01B31/04
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 103 36 575.3 2003-08-08 Germany