Patent US3235537A successfully refreshed from Google Patents.
US3235537A
Expired / Lapsed
US
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Fluorine containing terpolymer of a perfluorovinyl ether, vinylidene fluoride and a monomer of the structure cfx=cfy
Assignee: EIDP Inc
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Filing: 1961-06-23
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Granted: 1966-02-15
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Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 Albin Jerry Richard
- 👤 Gallagher George Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:57
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; C08F214/222; C07; C07C; C07C51/00; C07C51/58; C07C51/62; C08F16/00; C08F16/12; C08F16/14; C08F16/24; C08F214/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
NORMALLY-SOLID, CURABLE COPOLYMERS CONSISTING OF THE FOLLOWING MONOMER UNITS: (A) FROM 2 TO 50 MOLE PERCENT OF PERFLUOROALKYL PERFLUOROVINYL ETHER UNITS, IN WHICH UNITS THE PERFLUOROALKYL RADICAL CONTAINS 1 TO 3 CARBON ATOMS
Claim 2
Dependent Claim
33 words
NORMALLY-SOLID, CURABLE COPOLYMERS CONSISTING OF THE FOLLOWING MONOMER UNITS: (A) FROM 2 TO 50 MOLE PERCENT OF PERFLUOROALKYL PERFLUOROVINYL ETHER UNITS, IN WHICH UNITS THE PERFLUOROALKYL RADICAL CONTAINS 1 TO 3 CARBON ATOMS
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |