US3632834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing trichlorotrifluoroethane and dichlorotetrafluoroethane
Assignee: EIDP Inc
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Filing: 1968-10-23
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Granted: 1972-01-04
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Expires: 1988-10-23
Abstract
Abstract THE VAPOR PHASE PREPARATION OF 1,1,2-TRICHLORO-1,2,2TRIFLUOROETHANE AND 1,2-DICHLORO-1,1,2,2-TETRAFLUOROETHANE BY REACTING A LESS HIGHLY FLUORINATED PERHALOETHANE WITH HYDROGEN FLUORIDE IN THE PRESENCE OF CHROMIUM TRIFLUORIDE. ONE REACTANT IS PERCHLOROETHANE WHICH CAN BE PREPARED IN SITU FROM TETRACHLOROETHYLENE AND CHLORINE. THE PRESENCE OF UNDESIRABLE ISOMERS IN THE PRODUCTS OF THE PROCESS IS REDUCED.
Inventors
- 👤 Frank Joseph Christoph Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:08
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |