US3157707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reacting tetrachloroethylene, chlorine and hydrogen fluoride
Assignee: Union Carbide Corp
•
Filing: 1961-02-20
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Granted: 1964-11-17
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Expires: 1981-02-20
Abstract
No abstract record available.
Inventors
- 👤 Jared W Clark
- 👤 Joseph P Henry
- 👤 Charles E Rectenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:50
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS WHICH COMPRISES CONTACTING A VAPOR PHASE MIXTURE COMPRISING TETRACHLOROETHYLENE, CHLORINE AND HYDROGEN FLUORIDE WITH A CR2O3 CATALYST AT A TEMPERATURE BETWEEN 200*C. AND 450*C. AND RECOVERING TRICHLOROITRIFLUOROETHANE AND DICHLOROTETRAFLUOROETHANE AS PRODUCTS.
Claim 2
Dependent Claim
33 words
A PROCESS WHICH COMPRISES CONTACTING A VAPOR PHASE MIXTURE COMPRISING TETRACHLOROETHYLENE, CHLORINE AND HYDROGEN FLUORIDE WITH A CR2O3 CATALYST AT A TEMPERATURE BETWEEN 200*C. AND 450*C. AND RECOVERING TRICHLOROITRIFLUOROETHANE AND DICHLOROTETRAFLUOROETHANE AS PRODUCTS.
References Cited (Backward Citations)
US2714618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |