Patent US2063589A successfully refreshed from Google Patents.
Patent US4770898A successfully refreshed from Google Patents.
US4770898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing optical fiber
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1986-10-07
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Granted: 1988-09-13
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Expires: 2006-10-07
Abstract
Abstract A method for producing an optical fiber which comprises steps of: spinning an optical fiber from a molten preform for an optical fiber, applying a UV-curable resin to the surface of the spun optical fiber, and irradiating UV light through a layer of a material for absorbing UV light and a layer of a gas for preventing uncuring of the UV-curable resin to cure the UV-curable resin, by which the UV curable resin is homogeneously cured along its length.
Inventors
- 👤 Masakatsu Sugai
- 👤 Katsuyuki Tsuneishi
- 👤 Yuji Kameo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:37
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; B; B05; B05D; B05D3/00; B05D3/06; B29; B29C; B29C35/00; B29C35/02; B29C35/08; B29C35/10; C03B; C03B37/00; C03C25/104; C03C25/106; B29C35/0805; B29C2035/0827; B29L; B29L2011/00; B29L2011/0075
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A method for producing an optical fiber which comprises the steps of: spinning an optical fiber from a molten preform for an optical fiber; applying a UV curable resin to the surface of the spun optical fiber; and irradiating UV-light through a layer consisting of a mixture of a UV-light absorbing material and a diluent which scarcely absorbs UV light is flowed in order to make the cure rate constant along the length of the UV-curable resin by controlling the UV-light power which irradiates the UV-curable resin on the optical fiber.
Claim 2
Independent Claim
91 words
A method for producing an optical fiber which comprises the steps of: spinning an optical fiber from a molten preform for an optical fiber; applying a UV curable resin to the surface of the spun optical fiber; and irradiating UV-light through a layer consisting of a mixture of a UV-light absorbing material and a diluent which scarcely absorbs UV light is flowed in order to make the cure rate constant along the length of the UV-curable resin by controlling the UV-light power which irradiates the UV-curable resin on the optical fiber.
Claim 3
Dependent Claim
40 words
A method for producing an optical fiber according to claim 1, wherein the amount of UV-light power which irradiates the UV-curable resin on the optical fiber is adjusted by changing the content of the UV-light absorbing material in the mixture.
Claim 4
Dependent Claim
21 words
A method for producing an optical fiber according to claim 2 wherein means for the UV light absorbing material is chlorine.
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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |