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Patent US2549935A successfully refreshed from Google Patents.
US2549935A
Expired / Lapsed
US
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Polymers of hexafluoropropene
Assignee: EIDP Inc
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Filing: 1946-06-18
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Granted: 1951-04-24
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Expires: 1966-06-18
Abstract
No abstract record available.
Inventors
- 👤 John C Sauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:32
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE POLYMERIZATION PRODUCT OF A MIXTURE COMPRISING HEXAFLUOROPROPENE AND ANOTHER ETHYLENICALLY UNSATURATED POLYMERIZABLE COMPOUND THE HEXAFLUOROPROPENE BEING PRESENT IN THE SAID MIXTURE IN AN AMOUNT OF APPROXIMATELY 25% BY WEIGHT OF THE COMBINED WEIGHT OF THE POLYME
Claim 2
Dependent Claim
37 words
THE POLYMERIZATION PRODUCT OF A MIXTURE COMPRISING HEXAFLUOROPROPENE AND ANOTHER ETHYLENICALLY UNSATURATED POLYMERIZABLE COMPOUND THE HEXAFLUOROPROPENE BEING PRESENT IN THE SAID MIXTURE IN AN AMOUNT OF APPROXIMATELY 25% BY WEIGHT OF THE COMBINED WEIGHT OF THE POLYME
References Cited (Backward Citations)
US2468664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |