US4729624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrule for optical connector
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1985-10-11
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Granted: 1988-03-08
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Expires: 2005-10-11
Abstract
Abstract A ferrule for an optical connector made of a resin composition comprising a resin and carbon fiber as a filler having larger flexural strength and small mold shrinkage factor. The ferrule has a metal tube around its body that is embedded in its flange portion for added flexural rigidity.
Inventors
- 👤 Toshiaki Kakii
- 👤 Koichiro Matsuno
- 👤 Shuzo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:09
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/3833; G02B6/3865; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
A ferrule for an optical connector having a flange portion, which is made of a resinous composition comprising a resin and carbon fiber as a filler, wherein at least part of the outer surface of said ferrule is surrounded by a metal tube, one end of which is embedded in the flange portion, one end of said ferrule protruding from the end of the metal tube that is not embedded in said flange portion, whereby a ferrule having increased flexural strength is provided.
Claim 2
Dependent Claim
83 words
A ferrule for an optical connector having a flange portion, which is made of a resinous composition comprising a resin and carbon fiber as a filler, wherein at least part of the outer surface of said ferrule is surrounded by a metal tube, one end of which is embedded in the flange portion, one end of said ferrule protruding from the end of the metal tube that is not embedded in said flange portion, whereby a ferrule having increased flexural strength is provided.
Claim 3
Dependent Claim
28 words
A ferrule according to claim 1, wherein a coefficient of thermal expansion of the resinous composition is the same as or smaller than that of the metal tube.
Claim 4
Dependent Claim
20 words
A ferrule according to claim 1, wherein a mold shrinkage factor of the resinous composition is not larger than 0.2%.
References Cited (Backward Citations)
US4512630A
Cited
US4195045A
Cited
US4186999A
Cited
EP0040174A2
Cited
US4456653A
Cited
US4505979A
Cited
JPS57186708A
Cited
JPS5827112A
Cited
DE3141377A1
Cited
JPS58118615A
Cited
US4629286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |