US3159609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of perfluorovinyl ethers
Assignee: EIDP Inc
•
Filing: 1956-10-26
•
Granted: 1964-12-01
•
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 12:51
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)
US2799712A
Cited
US2917548A
Cited
US2475423A
Cited
US2737530A
Cited
US2559752A
Cited
US2784175A
Cited
US2813848A
Cited
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 |