Patent US2704775A successfully refreshed from Google Patents.
US2704775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of halogenated olefines
Assignee: Union Carbide Corp
•
Filing: 1951-02-02
•
Granted: 1955-03-22
•
Expires: 1971-02-02
Abstract
No abstract record available.
Inventors
- 👤 Jared W Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:20
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/23
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
IN A PROCESS FOR PREPARING 1,1,2-TRIFLUORO-2-CHLOROETHENE, THE STEP WHICH COMPRISES SUBJECTING A MIXTURE OF HYDROGEN AND 1,1,2-TRIFLUORO-1,2,2-TRICHLOROETHANE IN THE VAPOR PHASE TO A TEMPERATURE BETWEEN ABOUT 450*C. AND ABOUT 550*C. IN CONTACT WITH METALLIC NICKEL.
References Cited (Backward Citations)
US2504919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |