US3291864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytetrafluoroethylene composition containing vinylidene fluoride-perfluoroproylenecopolymer
Assignee: Individual
•
Filing: 1961-11-21
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Granted: 1966-12-13
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Judson B Eldridge
- 👤 Elmo C Julian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:01
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29K; B29K2027/00; B29K2027/12; B29K2027/18; C08L27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A COMPOSITION OF MATTER COMPRISING 12 TO 35% BY WEIGHT OF A COPOLYMER OF VINYLIDENE FLUORIDE AND PERFLUOROPROPYLENE IN INTIMATE ADMIXTURE WITH 65 TO 88% BY WEIGHT OF POLYTETRAFLYOROETHYLENE, SAID COPOLYMER CONSISTING ESSENTIALLY OF 32.1% BY WEIGHT CARBON, 1.8% BY WEIGHT HYDROGEN AND 66.1% BY WEIGHT FLUORINE.
Claim 2
Dependent Claim
47 words
A COMPOSITION OF MATTER COMPRISING 12 TO 35% BY WEIGHT OF A COPOLYMER OF VINYLIDENE FLUORIDE AND PERFLUOROPROPYLENE IN INTIMATE ADMIXTURE WITH 65 TO 88% BY WEIGHT OF POLYTETRAFLYOROETHYLENE, SAID COPOLYMER CONSISTING ESSENTIALLY OF 32.1% BY WEIGHT CARBON, 1.8% BY WEIGHT HYDROGEN AND 66.1% BY WEIGHT FLUORINE.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |