US4125644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation cured coatings for fiber optics
Assignee: WR Grace and Co Conn
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Filing: 1977-05-11
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Granted: 1978-11-14
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Expires: 1997-05-11
Abstract
Abstract A continuous protective coating is formed on a fiber optic by coating said fiber optic in a bath of a liquid radiation curable composition at a temperature up to 90° C and thereafter exposing the coated conductor to ultraviolet or high energy ionizing radiation to cure the coating.
Inventors
- 👤 Arthur D. Ketley
- 👤 Charles R. Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:04
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/4486; B; B05; B05D; B05D7/00; B05D7/20; B29; B29D; B29D11/00; B29D11/00663; C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/834; C08G18/835; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12; C09; C09D; C09D181/00; C09D181/04; B05D3/00; B05D3/06; B05D3/061; B05D3/065; B05D3/067; B05D3/068
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A process for forming a continuous flexible adherent cured coating on the surface of a glass optical fiber which comprises immersing said fiber in a bath of a liquid radiation curable composition at a temperature below 90° C. thus coating said optical fiber with said composition passing said coated optical fiber through a die and thereafter exposing said coated optical fiber to radiation from a member of the group consisting of U.V. and high energy ionizing radiation for a time sufficient to cure said coating on said fiber.
Claim 2
Dependent Claim
88 words
A process for forming a continuous flexible adherent cured coating on the surface of a glass optical fiber which comprises immersing said fiber in a bath of a liquid radiation curable composition at a temperature below 90° C. thus coating said optical fiber with said composition passing said coated optical fiber through a die and thereafter exposing said coated optical fiber to radiation from a member of the group consisting of U.V. and high energy ionizing radiation for a time sufficient to cure said coating on said fiber.
Claim 3
Dependent Claim
64 words
The process according to claim 1 wherein the radiation curable composition comprises (1) an ethylenically unsaturated polyene containing at least two reactive unsaturated carbon-to-carbon bonds per molecule, (2) a polythiol containing at least two thiol groups per molecule, the total functionality of the unsaturated carbon-to-carbon bonds per molecule in the polyene and the thiol groups per molecule in the polythiol being greater than four.
Claim 4
Dependent Claim
23 words
The process according to claim 1 wherein U.V. radiation is used and a photocuring rate accelerator is added to the radiation curable composition.
Claim 5
Dependent Claim
41 words
The process according to claim 1 wherein the glass optical fiber is a member of the group consisting of a uniform refractive index glass fiber, a step index fiber, a graded index fiber, a multimode fiber and a single mode fiber.
Claim 6
Dependent Claim
52 words
The process according to claim 1 wherein the radiation curable composition comprises: (1) at least one addition polymerizable ethylenically unsaturated component capable of forming a high polymer by photoinitiated polymerization in the presence of an addition polymerization initiator therefor activatable by U.V. light and (2) a minor amount of such an initiator.
Claim 7
Dependent Claim
19 words
The process according to claim 1 wherein the coating has a thickness in the range 0.1 to 10 mils.
References Cited (Backward Citations)
US3999834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |