US2894044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 1, 1-dichloro-1-fluoroethane
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-02-16
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Granted: 1959-07-07
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Expires: 1976-02-16
Abstract
No abstract record available.
Inventors
- 👤 Erhard J Prill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:22
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206; C07C17/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR THE PREPARATION OF 1,1-DICHLORO-1FLUOROETHANE IN WHICH ANHYDROUS HYDROGEN FLUORIDE AND METHYL CHLOROFORM ARE PASSED OVER A CATALYTIC MATERIAL HEATED TO A TEMPERATURE OF 60 TO 125*C., THE SAID CATALYTIC MATERIAL COMPRISING A CATALYST SELECTED FROM THE GROUP CONSISTING OF STANNIC FLUORIDE ON ACTIVATED CARBON, AND ALUMINUM FLUORIDE.
Claim 2
Dependent Claim
50 words
A PROCESS FOR THE PREPARATION OF 1,1-DICHLORO-1FLUOROETHANE IN WHICH ANHYDROUS HYDROGEN FLUORIDE AND METHYL CHLOROFORM ARE PASSED OVER A CATALYTIC MATERIAL HEATED TO A TEMPERATURE OF 60 TO 125*C., THE SAID CATALYTIC MATERIAL COMPRISING A CATALYST SELECTED FROM THE GROUP CONSISTING OF STANNIC FLUORIDE ON ACTIVATED CARBON, AND ALUMINUM FLUORIDE.
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) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |