US2919263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of high molecular weight fluorine compounds
Assignee: Hoechst AG
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Filing: 1955-06-09
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Granted: 1959-12-29
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Expires: 1975-06-09
Abstract
No abstract record available.
Inventors
- 👤 Kahrs Karl-Heinz
- 👤 Frey Hans Helmut
- 👤 Scherer Otto
- 👤 Hahn Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:56
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR THE MANUFACTURE OF A HIGH MOLECULAR WEIGHT POLYMER CONTAINING FLUORINE WHICH COMPRISES POLYMERIZING, AS SUBSTANTIALLY THE SOLE MONOMERIC COMPONENTS OF THE REACTION, TRIFFUOROCHLOROETHYLENE IN THE RESENCE OF 1,1,1-TRIFFUOROPROPENE AT A TEMPERATURE BETWEEN -20 AND 50* C. IN THE PRESENCE OF A PEROXIDE POLYMERIZATIOIN PROMETER, THE WEIGHT RATIO OF TRIFFUOROCHLOROETHYLENE TO TRIFFUOROPROPENE BEING BETWEEN ABOUT 97:3 TO 99.9:0.1.
Claim 2
Dependent Claim
60 words
A PROCESS FOR THE MANUFACTURE OF A HIGH MOLECULAR WEIGHT POLYMER CONTAINING FLUORINE WHICH COMPRISES POLYMERIZING, AS SUBSTANTIALLY THE SOLE MONOMERIC COMPONENTS OF THE REACTION, TRIFFUOROCHLOROETHYLENE IN THE RESENCE OF 1,1,1-TRIFFUOROPROPENE AT A TEMPERATURE BETWEEN -20 AND 50* C. IN THE PRESENCE OF A PEROXIDE POLYMERIZATIOIN PROMETER, THE WEIGHT RATIO OF TRIFFUOROCHLOROETHYLENE TO TRIFFUOROPROPENE BEING BETWEEN ABOUT 97:3 TO 99.9:0.1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |