US3147314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxy terminated copolymers of vinylidene fluoride-hexafluoropropene
Assignee: EIDP Inc
•
Filing: 1960-02-29
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Granted: 1964-09-01
•
Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 Edward F Cluff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:41
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/06; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A CARBOXYL-TERMINATED COPOLYMER SELECTED FROM THE GROUP CONSISTING OF (A) VINYLIDENE FLUORIDE-HEXAFLUOROPROPENE COPOLYMER AND (B) VINYLIDENE FLUROIDE-HEXAFLUOROPRONENE-TETRAFLUOROETHYLENE COPOLYMER, SAID COPOLYMER HAVING A CARBOXYL CONTENT OF FROM ABOUT 0.2 TO ABOUT 3.75 PERCENT OF WEIGHT AND HAVING AN INHERENT VISCOSITY OF FROM ABOUT 0.04 TO ABOUT 0.25 AT 30*C. IN 1.0 PERCENT BY WEIGHT SOLUTION IN ANHYDROUS ACETONE.
Claim 2
Dependent Claim
57 words
A CARBOXYL-TERMINATED COPOLYMER SELECTED FROM THE GROUP CONSISTING OF (A) VINYLIDENE FLUORIDE-HEXAFLUOROPROPENE COPOLYMER AND (B) VINYLIDENE FLUROIDE-HEXAFLUOROPRONENE-TETRAFLUOROETHYLENE COPOLYMER, SAID COPOLYMER HAVING A CARBOXYL CONTENT OF FROM ABOUT 0.2 TO ABOUT 3.75 PERCENT OF WEIGHT AND HAVING AN INHERENT VISCOSITY OF FROM ABOUT 0.04 TO ABOUT 0.25 AT 30*C. IN 1.0 PERCENT BY WEIGHT SOLUTION IN ANHYDROUS ACETONE.
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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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |