Global Patent Index - EP 0996597 A1

EP 0996597 A1 2000-05-03 - GERMANIUM CHLORIDE AND SILOXANE FEEDSTOCK FOR FORMING SILICA GLASS AND METHOD

Title (en)

GERMANIUM CHLORIDE AND SILOXANE FEEDSTOCK FOR FORMING SILICA GLASS AND METHOD

Title (de)

GERMANIUMCHLORID- UND SILOXANREAGENTEN FÜR DIE HERSTELLUNG VON SILICAGLAS UND VERFAHREN

Title (fr)

CHLORURE DE GERMANIUM ET MATIERE PREMIERE DE SILOXANE DESTINES A LA FORMATION DE VERRE DE SILICE ET PROCEDE AFFERENT

Publication

EP 0996597 A1 (EN)

Application

EP 98935493 A

Priority

  • US 9813401 W
  • US 5273797 P

Abstract (en)

[origin: WO9902459A1] Disclosed is a method of making optical waveguide preforms and optical waveguides which may be drawn to a fiber. A silica forming feedstock which includes a mixture of siloxane and germanium chloride and an optical waveguide preform manufacturing apparatus is also disclosed. Further disclosure includes the mixing prior to deposition and use of high purity siloxane with high purity germanium chloride to produce germanium doped silica. The delivery lines for the feedstock to the deposition side may be heated to 175 DEG C-200 DEG C.

IPC 1-7 (main, further and additional classification)

C03B 37/014; C03B 19/14

IPC 8 full level (invention and additional information)

C03B 8/04 (2006.01); C03B 19/14 (2006.01); C03B 37/014 (2006.01); C03B 37/018 (2006.01)

CPC (invention and additional information)

C03B 37/01413 (2013.01); C03B 19/1415 (2013.01); C03B 2201/31 (2013.01); C03B 2207/32 (2013.01); C03B 2207/81 (2013.01)

Citation (search report)

See references of WO 9902459A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 9902459 A1 19990121; AU 743831 B2 20020207; AU 8473098 A 19990208; BR 9810379 A 20000905; CA 2288769 A1 19990121; CN 1259109 A 20000705; EP 0996597 A1 20000503; ID 24873 A 20000831; JP 2001509469 A 20010724; TW 460424 B 20011021

INPADOC legal status


2004-04-14 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20031014

2002-04-17 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020228

2000-05-03 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000128

2000-05-03 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IT