US5018828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber
Assignee: Mitsui Chemicals Inc
•
Filing: 1989-03-01
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Granted: 1991-05-28
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Expires: 2009-03-01
Abstract
Abstract An optical fiber of heat resistance, low-temperature resistance, flexural resistance, water absorption resistance, chemical resistance, etc., is provided by comprising a composition in which a core component comprises a polycarbonate or a silica type glass, a clad component comprises a graft-modified poly (4-methyl-1-pentene).
Inventors
- 👤 Akio Ohdaira
- 👤 Shunji Abe
- 👤 Noboru Wakatsuki
- 👤 Akira Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:37
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; C; C08; C08F; C08F255/00; C08F255/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
An optical fiber comprising: (a) a core component comprising a polycarbonate or a silica type glass; and (b) a clad component comprising at least 0.1% by weight of a composition composed of a graft-modified poly (4-methyl-1-pentene) (A) which is partially or entirely graft-modified with an unsaturated carboxylic acid or its derivative at a grafted amount within the range of from 0.1 to 10% by weight and 1 to 15% by weight, based on 100 parts by weight of said composition, of a low molecular weight compound having a number-average molecular weight of 300 to 5,000.
Claim 2
Dependent Claim
95 words
An optical fiber comprising: (a) a core component comprising a polycarbonate or a silica type glass; and (b) a clad component comprising at least 0.1% by weight of a composition composed of a graft-modified poly (4-methyl-1-pentene) (A) which is partially or entirely graft-modified with an unsaturated carboxylic acid or its derivative at a grafted amount within the range of from 0.1 to 10% by weight and 1 to 15% by weight, based on 100 parts by weight of said composition, of a low molecular weight compound having a number-average molecular weight of 300 to 5,000.
Claim 3
Dependent Claim
18 words
An optical fiber according to claim 1 wherein the low molecular weight compound is an aliphatic hydrocarbon compound.
Claim 4
Dependent Claim
18 words
An optical fiber according to claim 1 wherein the low molecular weight compound is an alicyclic hydrocarbon compound.
Claim 5
Dependent Claim
17 words
An optical fiber according to claim 2 wherein the aliphatic hydrocarbon compound is an ethylene-α-olefin random copolymer.
Claim 6
Dependent Claim
38 words
An optical fiber according to claim 4 wherein the ethylene-α-olefin random copolymer has an ethylene content of 10 to 95 mol%, a crystallinity by X-ray of 0 to 20% and a molecular weight distribution of 3 or less.
Claim 7
Dependent Claim
48 words
An optical fiber according to claim 2 wherein the aliphatic hydrocarbon compound is an oligomer (D) represented by the formula: ##STR5## wherein n and p are integers of 0 or more, m is 0 or 1, and R is: ##STR6## having a molecular distribution of 3 or less.
Claim 8
Dependent Claim
16 words
An optical fiber according to claim 6 wherein the oligomer is a hydrogenated product of polyisoprene.
Claim 9
Dependent Claim
13 words
An optical fiber according to claim 6 wherein the oligomer is a squalene.
Claim 10
Dependent Claim
24 words
An optical fiber according to claim 1 wherein the unsaturated carboxylic acid or its derivative is an unsaturated dicarboxylic acid or an acid anhydride.
Claim 11
Dependent Claim
15 words
An optical fiber according to claim 9 wherein the unsaturated dicarboxylic acid is maleic acid.
Claim 12
Dependent Claim
16 words
An optical fiber according to claim 9 wherein the unsaturated carboxylic acid anhydide is maleic anhydride.
Claim 13
Dependent Claim
22 words
An optical fiber according to claim 1 wherein the said clad component comprises at least 0.5% by weight of said graft-modified poly(4-methyl-1-pentene)(A).
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |