US4334733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated glass fibers for optical transmission
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1980-01-23
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Granted: 1982-06-15
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Expires: 2000-01-23
Abstract
Abstract In a glass fiber for optical transmission comprising a primary coat, a thermoplastic resin coat, and a buffer coat between the primary coat and the thermoplastic resin coat, the improvement which comprises said thermoplastic resin being a polyamide having a modulus of elasticity of about 2,000 to 8,000 kg/cm 2 at a temperature in the range of 20 to 23° C.
Inventors
- 👤 Mikio Takeshima
- 👤 Masaaki Kawase
- 👤 Toru Yamanishi
- 👤 Masaaki Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:34
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/1065; B; B29; B29D; B29D11/00; B29D11/00663; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4402
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
In a glass fiber for optical transmission comprising a primary coat, a thermoplastic resin coat, and a buffer coat between the primary coat and the thermoplastic resin coat, the improvement which comprises said thermoplastic resin being a polyamide having a modulus of elasticity of about 2,000 to 8,000 kg/cm 2 at a temperature in the range of 20° to 23° C.
Claim 2
Dependent Claim
61 words
In a glass fiber for optical transmission comprising a primary coat, a thermoplastic resin coat, and a buffer coat between the primary coat and the thermoplastic resin coat, the improvement which comprises said thermoplastic resin being a polyamide having a modulus of elasticity of about 2,000 to 8,000 kg/cm 2 at a temperature in the range of 20° to 23° C.
Claim 3
Dependent Claim
17 words
A glass fiber for optical transmission according to claim 1, wherein said polyamide is a polyamide copolymer.
Claim 4
Dependent Claim
23 words
A glass fiber for optical transmission according to claim 2, wherein said polyamide copolymer comprises at least 80% by weight of nylon 12.
Claim 5
Dependent Claim
18 words
A glass fiber for optical transmission according to claim 1, wherein said polyamide is a mixture of polyamides.
Claim 6
Dependent Claim
24 words
A glass fiber for optical transmission according to claim 4, wherein said mixture of polyamides comprises at least 80% by weight of nylon 12.
Claim 7
Dependent Claim
27 words
A glass fiber for optical transmission according to claim 4, wherein said mixture of polyamides comprises at least 80% by weight of a copolymer of nylon 12.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |