US2441400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylene removal process
Assignee: Union Oil Company of California
•
Filing: 1943-05-12
•
Granted: 1948-05-11
•
Expires: 1963-05-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Doumani
- 👤 Davis A Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:52
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/14833; C07C7/1485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1083165A
Cited
US1771350A
Cited
GB424843A
Cited
US2237353A
Cited
US2316536A
Cited
US2370809A
Cited
US2322281A
Cited
US2388928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |