US2917546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sym-tetrafluoroacetone
Assignee: Honeywell International Inc
•
Filing: 1958-05-14
•
Granted: 1959-12-15
•
Expires: 1978-05-14
Abstract
No abstract record available.
Inventors
- 👤 Gordon Joseph
- 👤 Woolf Cyril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:06
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE PROCESS FOR MAKING CHF2.CO.CHF2 WHICH COMPRISES SUBJECTING VAPOR-PHASE CCIF2.CO.CCIF2. ACTION OF HYDROGEN IN AMOUNT IN EXCESS OF TWO MOLECULAR PROPORTIONS OF HYDROGEN PER MOL OF CCIF.CO.CCIF2. WHILE MAINTAINING TEMPERATURE NOT LESS THAN ABOUT 125* C. AND WHILE IN THE PRESENCE OF A SUPPORTED PALLADIUM CATALYST; AND RECOVERING CHF2.CO.CHF2 FROM THE RESULTING REACTION PRODUCT.
Claim 2
Dependent Claim
54 words
THE PROCESS FOR MAKING CHF2.CO.CHF2 WHICH COMPRISES SUBJECTING VAPOR-PHASE CCIF2.CO.CCIF2. ACTION OF HYDROGEN IN AMOUNT IN EXCESS OF TWO MOLECULAR PROPORTIONS OF HYDROGEN PER MOL OF CCIF.CO.CCIF2. WHILE MAINTAINING TEMPERATURE NOT LESS THAN ABOUT 125* C. AND WHILE IN THE PRESENCE OF A SUPPORTED PALLADIUM CATALYST; AND RECOVERING CHF2.CO.CHF2 FROM THE RESULTING REACTION PRODUCT.
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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |