US3148223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoroallene
Assignee: EIDP Inc
•
Filing: 1957-07-11
•
Granted: 1964-09-08
•
Expires: 1977-07-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Jacobs
- 👤 Ronald S Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/02; C07C21/19; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PROCESS FOR PREPARING PERFLUOROALLENE, B.P. -38* C., CONSISTING ESSENTIALLY OF REACTING A COMPOUND OF THE CLASS CONSISTING OF 3-BROMO-1,1,3,3-TETRAFLUOROPROPENE AND 1,3-DIBROMO-1,1,3,3-TETRAFLUOROPROPANE WITH A DRY ALKALI METAL HYDROXIDE.
Claim 2
Dependent Claim
28 words
A PROCESS FOR PREPARING PERFLUOROALLENE, B.P. -38* C., CONSISTING ESSENTIALLY OF REACTING A COMPOUND OF THE CLASS CONSISTING OF 3-BROMO-1,1,3,3-TETRAFLUOROPROPENE AND 1,3-DIBROMO-1,1,3,3-TETRAFLUOROPROPANE WITH A DRY ALKALI METAL HYDROXIDE.
References Cited (Backward Citations)
US2668182A
Cited
US2729613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |