Patent US2854490A successfully refreshed from Google Patents.
US2854490A
Expired / Lapsed
US
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Thermal decomposition of trifluoroethylene polymers
Assignee: Hoechst AG
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Filing: 1955-08-01
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Granted: 1958-09-30
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Expires: 1975-08-01
Abstract
No abstract record available.
Inventors
- 👤 Fischer Edgar
- 👤 Frey Hans-Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:29
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/361; C07C17/367; C08; C08F; C08F8/00; C08F8/06; C08F8/26; C08F8/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
PROCESS FOR THE PREPARATION OF LOW MOLECULAR WEIGHT OILS AND WAXES CONTAINING CARBON, FLUORINE AND CHLORINE BY THERMAL DECOMPOSITION OF A POLYMER OF THE GROUP CONSISTING OF THE HOMOPOLYMERS AND COPOLYMERS OF TRIFLUOROCHLOROETHYLENE WHEREIN THE COMONOMER IS A MONOOLEFIN HAVING NOT MORE THAN THREE CARBON ATOMS AND HAVING AT LEAST ONE SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF CHLORINE, FLUORINE AND A CARBOXYL RADICAL, WHICH PROCESS IS CHARACTERIZED IN THAT THE DECOMPOSITION IS UNDERTAKEN IN THE PRESENCE OF STEAM AT TEMPERATURES OF 100 TO 500*C.
Claim 2
Dependent Claim
85 words
PROCESS FOR THE PREPARATION OF LOW MOLECULAR WEIGHT OILS AND WAXES CONTAINING CARBON, FLUORINE AND CHLORINE BY THERMAL DECOMPOSITION OF A POLYMER OF THE GROUP CONSISTING OF THE HOMOPOLYMERS AND COPOLYMERS OF TRIFLUOROCHLOROETHYLENE WHEREIN THE COMONOMER IS A MONOOLEFIN HAVING NOT MORE THAN THREE CARBON ATOMS AND HAVING AT LEAST ONE SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF CHLORINE, FLUORINE AND A CARBOXYL RADICAL, WHICH PROCESS IS CHARACTERIZED IN THAT THE DECOMPOSITION IS UNDERTAKEN IN THE PRESENCE OF STEAM AT TEMPERATURES OF 100 TO 500*C.
References Cited (Backward Citations)
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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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |