Patent US4756600A successfully refreshed from Google Patents.
US4756600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics packaged optical fibres
Assignee: Nortel Networks Ltd
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Filing: 1986-07-14
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Granted: 1988-07-12
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Expires: 2006-07-14
Abstract
Abstract A design of plastics packaged glass optical fibre in which the plastics packaging consists of a urethane acrylate primary coating, a silicone rubber secondary coating and a nylon tertiary coating, the three coatings coacting to provide a pair of substantially decoupled mechanical filters.
Inventors
- 👤 Melvin M. Ramsay
- 👤 Mahesh K. R. Vyas
- 👤 Stuart R. Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:56
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/443
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
A plastics packaged glass optical fibre which contains an optical waveguiding structure within the glass, wherein the plastics packaging consists of primary, secondary and tertiary coating layers of relatively high, relatively low and relatively high modulus respectively, wherein the primary coating layer is a UV curable resin having a modulus in the range 5 to a few hundred MPa and a thickness of at least 30 microns, wherein the secondary coating layer has a modulus at least two orders of magnitude smaller than that of the primary coating, and a thickness of at least 50 microns, and wherein the tertiary coating has a modulus in the range 400 to 3000 MPa and a thickness of at least 40 microns.
Claim 2
Dependent Claim
119 words
A plastics packaged glass optical fibre which contains an optical waveguiding structure within the glass, wherein the plastics packaging consists of primary, secondary and tertiary coating layers of relatively high, relatively low and relatively high modulus respectively, wherein the primary coating layer is a UV curable resin having a modulus in the range 5 to a few hundred MPa and a thickness of at least 30 microns, wherein the secondary coating layer has a modulus at least two orders of magnitude smaller than that of the primary coating, and a thickness of at least 50 microns, and wherein the tertiary coating has a modulus in the range 400 to 3000 MPa and a thickness of at least 40 microns.
Claim 3
Dependent Claim
22 words
A plastics packaged glass optical fibre as claimed in claim 1, wherein the material of the secondary coating is a silicone rubber.
Claim 4
Dependent Claim
24 words
A plastics packaged glass optical fibre as claimed in claim 2, wherein the material of the secondary coating is a UV curing silicone rubber.
Claim 5
Dependent Claim
21 words
A plastics packaged glass optical fibre as claimed in claim 3, wherein the material of the tertiary coating is a nylon.
Claim 6
Dependent Claim
22 words
A plastics packaged glass optical fibre as claimed in claim 3, wherein the material of the tertiary coating is a polyester elastomer.
Claim 7
Dependent Claim
22 words
A plastics packaged glass optical fibre as claimed in claim 3, wherein the material of the primary coating is a urethane acrylate.
Claim 8
Dependent Claim
22 words
A plastics packaged glass optical fibre as claimed in claim 3, wherein the secondary coating has a thickness not exceeding 200 microns.
Claim 9
Dependent Claim
125 words
An optical fibre cable incorporating at least one plastics packaged optical fibre which contains an optical waveguiding structure within the glass, wherein the plastics packaging consists of primary, secondary and tertiary coating layers of relatively high, relatively low and relatively high modulus respectively, wherein the primary coating layer is a UV curable resign having a modulus in the range 5 to a few hundred MPa and a thickness of at least 30 microns, wherein the secondary coating layer has a modulus at least two orders of magnitude smaller than that of the primary coating, and a thickness of at least 50 microns, and wherein the tertiary coating has a modulus in the range 400 to 3000 MPa and a thickness of at least 40 microns.
Claim 10
Dependent Claim
125 words
An optical fibre cable incorporating at least one plastics packaged optical fibre which contains an optical waveguiding structure within the glass, wherein the plastics packaging consists of primary, secondary and tertiary coating layers of relatively high, relatively low and relatively high modulus respectively, wherein the primary coating layer is a UV curable resign having a modulus in the range 5 to a few hundred MPa and a thickness of at least 30 microns, wherein the secondary coating layer has a modulus at least two orders of magnitude smaller than that of the primary coating, and a thickness of at least 50 microns, and wherein the tertiary coating has a modulus in the range 400 to 3000 MPa and a thickness of at least 40 microns.
Claim 11
Dependent Claim
26 words
A cable as claimed in claim 8, wherein the material of the secondary coating of each plastics packaged fibre of the cable is a silicone rubber.
Claim 12
Dependent Claim
30 words
A cable as claimed in claim 8, wherein the material of the secondary coating of the or each plastics packaged fibre of the cable is a UV curing silicone rubber.
References Cited (Backward Citations)
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Cited
GB2038021A
Cited
GB2046625A
Cited
GB2078996A
Cited
GB2086607A
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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) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |