US2900423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of perfluoropropene
Assignee: Honeywell International Inc
•
Filing: 1957-12-13
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Granted: 1959-08-18
•
Expires: 1977-12-13
Abstract
No abstract record available.
Inventors
- 👤 Lee B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:36
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE PROCESS FOR MAKING CF3CF=CF2 WHICH COMPRISES SUBJECTING CF3CFCLCF3 IN A REACTION ZONE TO THE ACTION OF HYDROGEN IN QUANTITY SUFFICIENT TO REACT WITH A SUBSTANTIAL AMOUNT OF SAID CF3CFCLCF3, WHILE MAINTAINING TEMPERATURES SUBSTANTIALLY IN THE RANGE OF 375-475* C. AND WHILE IN THE PRESENCE OF A METALLIC COPPER-OXIDE OF CHROMIUM-METALLIC NICKEL CATALYST, AND RECOVERING CF3CF=CF2 FROM THE RESULTING REACTION PRODUCT.
Claim 2
Dependent Claim
61 words
THE PROCESS FOR MAKING CF3CF=CF2 WHICH COMPRISES SUBJECTING CF3CFCLCF3 IN A REACTION ZONE TO THE ACTION OF HYDROGEN IN QUANTITY SUFFICIENT TO REACT WITH A SUBSTANTIAL AMOUNT OF SAID CF3CFCLCF3, WHILE MAINTAINING TEMPERATURES SUBSTANTIALLY IN THE RANGE OF 375-475* C. AND WHILE IN THE PRESENCE OF A METALLIC COPPER-OXIDE OF CHROMIUM-METALLIC NICKEL CATALYST, AND RECOVERING CF3CF=CF2 FROM THE RESULTING REACTION PRODUCT.
References Cited (Backward Citations)
US2685606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |