Patent US4697877A successfully refreshed from Google Patents.
US4697877A
Expired / Lapsed
US
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Surface-coated optical fiber
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1985-03-06
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Granted: 1987-10-06
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Expires: 2005-03-06
Abstract
Abstract The surface-coated optical fiber of the invention is composed of a fibrous body of a vitreous material, e.g. fused quartz glass, and a coating layer thereon formed of a coating composition comprising an organosiloxane-modified organic polymer, of which the backbone is formed of recurring organic units such as a polybutadiene, an acrylic polymer and the like having modifying pendant groups containing an organosiloxane unit. The workability of the coating composition in the coating application is excellent so that a high uniformity is obtained in the coating layer in comparison with a coating composition comprising an unmodified organic polymer. The coating layer thus formed has a remarkably improved mechanical strength over a coating layer formed of an organopolysiloxane resin alone.
Inventors
- 👤 Yoshinori Hida
- 👤 Noriyuki Meguriya
- 👤 Akira Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:15
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/442; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A surface-coated optical fiber which comprises: (a) a fibrous body made of a vitreous material; and (b) a coating layer on the surface of the fibrous body formed of a coating composition comprising an organosiloxane-modified organic polymer having a molcular structure composed of a backbone of recurring organic units having no silicon atoms and at least one pendant group on the backbone which is an organic group containing a unit represented by the general average unit formula R a SiO 4-a/2 , in wich R is an atom or a group selected from the class consisting of a hydrogen atom, substituted or unsubstituted monovalent hydrocarbon groups, alkoxy groups and a hydroxy group and a is a number of the range from 1 to 3.
Claim 2
Dependent Claim
124 words
A surface-coated optical fiber which comprises: (a) a fibrous body made of a vitreous material; and (b) a coating layer on the surface of the fibrous body formed of a coating composition comprising an organosiloxane-modified organic polymer having a molcular structure composed of a backbone of recurring organic units having no silicon atoms and at least one pendant group on the backbone which is an organic group containing a unit represented by the general average unit formula R a SiO 4-a/2 , in wich R is an atom or a group selected from the class consisting of a hydrogen atom, substituted or unsubstituted monovalent hydrocarbon groups, alkoxy groups and a hydroxy group and a is a number of the range from 1 to 3.
Claim 3
Dependent Claim
23 words
The surface-coated optical fiber as claimed in claim 1 wherein the fibrous body of a vitreous material is a fused quartz glass fiber.
Claim 4
Dependent Claim
23 words
The surface-coated optical fiber as claimed in claim 1 wherein the group denoted by R is a methyl group or a propyl group.
Claim 5
Dependent Claim
33 words
The surface-coated optical fiber as claimed in claim 1 wherein the unit represented by the general average unit formula is bonded to the backbone of the recurring organic units through a silicon-to-carbon linkage.
Claim 6
Dependent Claim
35 words
The surface-coated optical fiber as claimed in claim 1 in which said pendant groups are present in an amount of 10 to 100 parts per 100 parts of the backbone of the organosiloxane-modified organic polymer.
Claim 7
Dependent Claim
34 words
The surface-coated optical fiber as claimed in claim 1 in which said pendant groups are present in an amount 20 to 200 parts per 100 parts of the backbone of the organosiloxane-modified organic polymer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |