US3790540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric fluorinated terpolymer having good thermal stability
Assignee: Arkema Inc
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Filing: 1971-08-23
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Granted: 1974-02-05
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Expires: 1991-08-23
Abstract
Abstract THIS INVENTION RELATES TO A NOVEL AND THERMALLY STABLE TERPOLYMER OF VINYLIDENE FLUORIDE, HEXAFLUOROPROPANE AND TRIFLUOROETHYLENE IN RESPECTIVE QUANTITIES OF ABOUT 29-55% BY WEIGHT HEXAFLUOROPROPENE, 2-20% BY WEIGHT TRIFLUOROETHYLENE AND THE REMAINDER VINYLIDENE FLUORIDE WHICH TERPOLYMER FORMS AMINE-CURED VULCANIZATES WITH EXCELLENT INITIAL AND HEAT-AGED PROPERTIES.
Inventors
- 👤 J Dohany
- 👤 A Whiton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:47
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; C08F214/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |