US2623073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of unsaturated ketones
Assignee: California Research LLC
•
Filing: 1946-12-21
•
Granted: 1952-12-23
•
Expires: 1966-12-21
Abstract
No abstract record available.
Inventors
- 👤 William G Toland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315541A
Cited
US2348931A
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US2403671A
Cited
US2388510A
Cited
US2398685A
Cited
US2424186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |