US2958685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of perfluoropropylene
Assignee: EIDP Inc
•
Filing: 1957-08-09
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Granted: 1960-11-01
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Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 Eleuterio Herbert Sousa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:23
CPC Classifications
C; C08; C08F; C08F114/00; C08F114/18; C08F114/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
NORMALLY SOLID HOMOPOLYMER OF PERFLUOROPROPYLENE HAVING A SOFTENING POINT TEMPERATURE OF 225*C. TO 250*C. C., SAID POLYPERFLUOROPROPYLENE BEING CAPABLE OF BEING COMPRESSION MOLDED AT A TEMPERATURE ABOVE 250*C. INTO FLEXIBLE FILMS CAPABLE OF BEING REPEATEDLY CREASED AND FLEXED GHROUGH AN ANGLE OF 360*.
Claim 2
Dependent Claim
43 words
NORMALLY SOLID HOMOPOLYMER OF PERFLUOROPROPYLENE HAVING A SOFTENING POINT TEMPERATURE OF 225*C. TO 250*C. C., SAID POLYPERFLUOROPROPYLENE BEING CAPABLE OF BEING COMPRESSION MOLDED AT A TEMPERATURE ABOVE 250*C. INTO FLEXIBLE FILMS CAPABLE OF BEING REPEATEDLY CREASED AND FLEXED GHROUGH AN ANGLE OF 360*.
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |