US2743303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 1, 1, 4, 4-tetrafluorobutadiene 1, 3 from acetylene and tetrafluoroethylene
Assignee: EIDP Inc
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Filing: 1955-04-01
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Granted: 1956-04-24
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Expires: 1975-04-01
Abstract
No abstract record available.
Inventors
- 👤 Anderson John Lynde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:12
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/275
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
THE PROCESS FOR THE PREPARATION OF 1,1,4,4-TETRAFLUORO-1,3-BUTADIENE WHICH COMPRISES REACTING ACETYLENE WITH TETRAFLUOROETHYLENE AT A TEMPERATURE WITHIN THE RANGE 350* C.-900* C., AND ISOLATING 1,1,4,4-TETRAFLUORO-1,3BUTADIENE.
Claim 2
Dependent Claim
25 words
THE PROCESS FOR THE PREPARATION OF 1,1,4,4-TETRAFLUORO-1,3-BUTADIENE WHICH COMPRISES REACTING ACETYLENE WITH TETRAFLUOROETHYLENE AT A TEMPERATURE WITHIN THE RANGE 350* C.-900* C., AND ISOLATING 1,1,4,4-TETRAFLUORO-1,3BUTADIENE.
References Cited (Backward Citations)
US2462345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |