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Patent US3779627A successfully refreshed from Google Patents.
US3779627A
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Optical transmission line elements utilizing fluorinated polymers
Assignee: AT&T Inc
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Filing: 1971-05-17
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Granted: 1973-12-18
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Expires: 1991-05-17
Abstract
Abstract Optical transmission lines constructed of fully fluorinated polymers in the amorphous state, such as fluorinated ethylene propylene, have low inherent insertion loss characteristics.
Inventors
- 👤 D Pinnow
- 👤 Uitert Legrand Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:03
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; C; C08; C08L; C08L23/00; C08L23/26; C08L23/28; G02B6/10; G02B6/102
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
Transmission line of claim 1 in which said composition is polymeric, and has a viscosity of at least 107 poises at room temperature.
Claim 2
Dependent Claim
32 words
Transmission line of claim 2 in which said composition contains an average of at least 2000 carbon atoms in the main chain of the polymer molecule and is rigid at room temperature.
Claim 3
Dependent Claim
20 words
Transmission line of claim 1 in which essentially all the bonds between carbon atoms and terminal atoms are carbon-to-fluorine bonds.
Claim 4
Dependent Claim
14 words
Transmission line of claim 4 in which said composition consists essentially of a fluorocarbon.
Claim 5
Dependent Claim
33 words
Transmission line of claim 5 in which said fluorocarbon is fluorinated ethylene propylene copolymer containing at least 10 percent of moieties which may be derived from each of the monomers, ethylene and propylene.
Claim 6
Dependent Claim
19 words
Transmission line of claim 6 in which the average chain of said copolymer contains at least 103 monomeric units.
Claim 7
Dependent Claim
25 words
Transmission line of claim 4 in which said composition consists essentially of perfluoroalkylpolyethers, in which the average polymer chain contains at least 103 monomeric units.
Claim 8
Dependent Claim
24 words
Transmission line of claim 1 in which said composition is normally liquid and has an average of up to 50 carbon atoms per molecule.
References Cited (Backward Citations)
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |