US2598283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of perfluoropropene and tetrafluoroethylene and method of making same
Assignee: United States Atomic Energy Commission
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Filing: 1947-10-23
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Granted: 1952-05-27
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Expires: 1967-10-23
Abstract
No abstract record available.
Inventors
- 👤 William T Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:48
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
40 words
THE METHOD OF PREPARING TRANSPARENT SHEETS OF A SOLID PLASTIC COPOLYMER OF TETRAFLUOROETHYLENE AND PERFLUOROPROPENE WHICH COMPRISES PRESSING SUCH A SOLID COPOLYMER INTO SHEETS AT A TEMPERATURE BETWEEN ABOUT 300 AND ABOUT 350* C. AND THEN RAPIDLY COOLING SAID SHEETS.
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) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |