Title of Invention

METHOD FOR MAKING OPTICAL FIBER PREFORM USING SIMULTANEOUS INSIDE AND OUTSIDE DEPOSITION

Abstract A method and apparatus for making optical fiber preforms using simultaneous plasma deposition on the inside and outside surface of a starting tube. A starting tubular member (12) is rotated, CFOT chemicals (22) are selectively injected into the plasma torch (16) and CFIT chemicals (24) are selectively injected to flow through the hollow of the tube (12). The plasma torch is traversed along the tubular member to simultaneously deposit soot on the inside and outside surface. The soot on one or both surfaces may be consolidated into a silica layer as it is deposited. The plasma torch (16) is traversed again to deposit additional soot, and/or consolidate previously deposited soot, on one or both surfaces. The process is repeated until a predetermined amount of silica is formed on the tubular member. The tubular member is then collapsed. Optionally, additional plasma deposition is performed during or after the collapsing
Full Text

Documents:

2056-CHENP-2004 AMENDED CLAIMS 12-04-2011.pdf

2056-CHENP-2004 AMENDED PAGES OF SPECIFICATION 12-04-2011.pdf

2056-CHENP-2004 CORRESPONDENCE OTHERS 22-07-2011.pdf

2056-CHENP-2004 FORM-3 12-04-2011.pdf

2056-CHENP-2004 OTHER PATENT DOCUMENT 12-04-2011.pdf

2056-chenp-2004 other patent document1 12-04-2011.pdf

2056-CHENP-2004 POWER OF ATTORNEY 12-04-2011.pdf

2056-CHENP-2004 CORRESPONDENCE OTHERS 21-09-2010.pdf

2056-CHENP-2004 EXAMINATION REPORT REPLY RECEIVED 12-04-2011.pdf

2056-CHENP-2004 ABSTRACT.pdf

2056-CHENP-2004 CORRESPONDENCE OTHERS.pdf

2056-CHENP-2004 CORRESPONDENCE PO.pdf

2056-CHENP-2004 DRAWINGS.pdf

2056-CHENP-2004 FORM 1.pdf

2056-CHENP-2004 FORM 18.pdf

2056-CHENP-2004 FORM 3.pdf

2056-CHENP-2004 FORM 5.pdf

2056-CHENP-2004 PCT.pdf

2056-CHENP-2004 POWER OF ATTORNEY.pdf


Patent Number 248592
Indian Patent Application Number 2056/CHENP/2004
PG Journal Number 30/2011
Publication Date 29-Jul-2011
Grant Date 27-Jul-2011
Date of Filing 15-Sep-2004
Name of Patentee FIBERCORE, INC.
Applicant Address 253 WORCESTER ROAD, PO BOX 180, CHARLTON, MA 01507
Inventors:
# Inventor's Name Inventor's Address
1 GUSKOV, MIKHAIL, I ST. IVANA FOMINA 13-1, APT. ST. PETERSBURG 194352
2 DANILOV, Evguenie, B BOLSHEVIKOV, PR. 9-2, APT.11, ST. PETERSBURG 193313
3 HAMMERLE, WOLFGANG., A 7 LAUREL HILL ROAD, STURBRIDGE, MA 01566
4 WU, DAU 4475 ROSECLIFF PLACE, SAN DIEGO. CA 92130
PCT International Classification Number C03B37/108
PCT International Application Number PCT/US03/07841
PCT International Filing date 2003-03-14
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10/097,857 2002-03-15 U.S.A.