US2670387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorination of trifluorotrichloro-propene
Assignee: EIDP Inc
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Filing: 1949-04-29
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Granted: 1954-02-23
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Expires: 1969-04-29
Abstract
No abstract record available.
Inventors
- 👤 Hans B Gottlieb
- 👤 Joseph D Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:04
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/013; C07C17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS FOR PREPARING AT LEAST ONE OF 2:3:3-TRICHLOROPENTAFLUOROPROPANE AND 2:3-DICHLOROHEXAFLUOROPROPANE WHICH COMPRISES PASSING A MIXTURE OF VAPORS OF 1:1:1-TRIFLUORO-2:3:3TRICHLORO-2-PROPENE AND AN INERT GAS, THE MIXTURE CONTAINING FROM ABOUT 3% TO ABOUT 50% BY WEIGHT OF THE TRIFLUORO-TRICHLORO-PRPENE, OVER POWDERED COF3 HEATED AT A TEMPERATURE OF FROM ABOUT 50* C. TO ABOUT 150* C. AT A CONTACT TIME OF FROM ABOUT 1 TO ABOUT 10 MINUTES, WHILE STIRRING THE POWDERED COF3 TO CONTINUOUSLY EXPOSE FRESH SURFACES THEREOF TO THE MIXTURE OF GASES AND THEN SEPARATING THE PRODUCTS.
Claim 2
Dependent Claim
87 words
THE PROCESS FOR PREPARING AT LEAST ONE OF 2:3:3-TRICHLOROPENTAFLUOROPROPANE AND 2:3-DICHLOROHEXAFLUOROPROPANE WHICH COMPRISES PASSING A MIXTURE OF VAPORS OF 1:1:1-TRIFLUORO-2:3:3TRICHLORO-2-PROPENE AND AN INERT GAS, THE MIXTURE CONTAINING FROM ABOUT 3% TO ABOUT 50% BY WEIGHT OF THE TRIFLUORO-TRICHLORO-PRPENE, OVER POWDERED COF3 HEATED AT A TEMPERATURE OF FROM ABOUT 50* C. TO ABOUT 150* C. AT A CONTACT TIME OF FROM ABOUT 1 TO ABOUT 10 MINUTES, WHILE STIRRING THE POWDERED COF3 TO CONTINUOUSLY EXPOSE FRESH SURFACES THEREOF TO THE MIXTURE OF GASES AND THEN SEPARATING THE PRODUCTS.
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |