Patent US3244233A successfully refreshed from Google Patents.
Patent US3159609A successfully refreshed from Google Patents.
US3159609A
Expired / Lapsed
US
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Copolymers of perfluorovinyl ethers
Assignee: EIDP Inc
•
Filing: 1956-10-26
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Granted: 1964-12-01
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Expires: 1976-10-26
Abstract
No abstract record available.
Inventors
- 👤 John Ferguson Harris Jr
- 👤 Donald Irwin Mccane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:34
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/26; C08F214/262; C08F16/00; C08F16/12; C08F16/14; C08F16/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A NORMALLY SOLID COPOLYMER OF TETRAFLUOROETHYLENE AND AN ALKYL PERFLUOROVINYL ETHER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
15 words
A NORMALLY SOLID COPOLYMER OF TETRAFLUOROETHYLENE AND AN ALKYL PERFLUOROVINYL ETHER HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
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US2475423A
Cited
US2737530A
Cited
US2559752A
Cited
US2784175A
Cited
US2813848A
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US2982786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |