US2870224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 1, 1-difluoro-1, 2, 2-trichloroethane
Assignee: Hoechst AG
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Filing: 1956-06-05
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Granted: 1959-01-20
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Expires: 1976-06-05
Abstract
No abstract record available.
Inventors
- 👤 Scherer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:57
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE PRODUCTION OF 1,1-DIFLUORO-1,2,2TRICHLOROETHANE WHICH COMPRISESD REACTING HYDROGEN FLUORIDE WITH PENTACHLOROETHANE IN THE PRESENCE OF BETWEEN ABOUT 0.5 AND ABOUT 5 WEIGHT PRECENT OF CHLORINE BASED ON THE WEIGHT OF PENTAEHLOROETHANE AND AN ANTIMONY HALIDE, SAID HALIDE BEING SELECTED FROM THE GROUP CONSISTING OF FLUORINE AND CHLORINE, AT A TEMPERATURE ABOVE 110* C., VENTING THE HYDROGEN CHLORIDE FORMED DURING THE REACTION AND RECOVERING 1,1-DIFLUORO-1,2,2,-TRICHLOROETHANE AS A PRODUCTS OF THE PROCESS.
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE PRODUCTION OF 1,1-DIFLUORO-1,2,2TRICHLOROETHANE WHICH COMPRISESD REACTING HYDROGEN FLUORIDE WITH PENTACHLOROETHANE IN THE PRESENCE OF BETWEEN ABOUT 0.5 AND ABOUT 5 WEIGHT PRECENT OF CHLORINE BASED ON THE WEIGHT OF PENTAEHLOROETHANE AND AN ANTIMONY HALIDE, SAID HALIDE BEING SELECTED FROM THE GROUP CONSISTING OF FLUORINE AND CHLORINE, AT A TEMPERATURE ABOVE 110* C., VENTING THE HYDROGEN CHLORIDE FORMED DURING THE REACTION AND RECOVERING 1,1-DIFLUORO-1,2,2,-TRICHLOROETHANE AS A PRODUCTS OF THE PROCESS.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |