US3129250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
The product prepared by reacting acetylene with trifluoroethanol
Assignee: Pennwalt Corp
•
Filing: 1956-11-27
•
Granted: 1964-04-14
•
Expires: 1976-11-27
Abstract
No abstract record available.
Inventors
- 👤 Francis E Lawlor
- 👤 Braid Milton
- 👤 John T Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:26
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1902169A
Cited
US2482725A
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US2732370A
Cited
US2809218A
Cited
US2870218A
Cited
US2872487A
Cited
US1796690A
Cited
US1824963A
Cited
US2768174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |