US2830100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 1, 1-difluoroethane
Assignee: EIDP Inc
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Filing: 1956-04-06
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Granted: 1958-04-08
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Expires: 1976-04-06
Abstract
No abstract record available.
Inventors
- 👤 Frederic W Swamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:29
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/07; C07C17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE PROCESS FOR MAKING 1,1-DIFFUROETHANE WHICH COMPRISES DISSOLVING A MEMBER OF THE GROUP CONSISTING OF ANHYDROUS TITANIUM TETRACHLORIDE AND ANHYDROUS ANTIMONY PENTACHLORIDE IN A CONCENTRATION OF FROM 1% TO ABOUT 5% BY WEIGHT IN SUBSTANTIALLY PURE LIQUID HF, AND THEN PASSING GASEOUS ACETYLENE FREE OF CATALYST POISONS INTO THE SOLUTION WHILE MAINTAINING THE SOLUTION AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 65*C. AND UNDER A PRESSURE OF FROM 0 TO ABOUT 75 P. S. I. GAUGE SUFFICIENT TO MAINTAIN THE HF IN THE LIQUID STATE AT THE TEMPERATURE EMPLOYED.
Claim 2
Dependent Claim
91 words
THE PROCESS FOR MAKING 1,1-DIFFUROETHANE WHICH COMPRISES DISSOLVING A MEMBER OF THE GROUP CONSISTING OF ANHYDROUS TITANIUM TETRACHLORIDE AND ANHYDROUS ANTIMONY PENTACHLORIDE IN A CONCENTRATION OF FROM 1% TO ABOUT 5% BY WEIGHT IN SUBSTANTIALLY PURE LIQUID HF, AND THEN PASSING GASEOUS ACETYLENE FREE OF CATALYST POISONS INTO THE SOLUTION WHILE MAINTAINING THE SOLUTION AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 65*C. AND UNDER A PRESSURE OF FROM 0 TO ABOUT 75 P. S. I. GAUGE SUFFICIENT TO MAINTAIN THE HF IN THE LIQUID STATE AT THE TEMPERATURE EMPLOYED.
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |