US3397225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of esters of unsaturated acids
Assignee: Union Oil Company of California
•
Filing: 1964-06-15
•
Granted: 1968-08-13
•
Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Donald M Fenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C51/00; C07C51/10; C07C51/14; C07C69/34; C07C69/40; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2831029A
Cited
US2876254A
Cited
US3040090A
Cited
US3065242A
Cited
US3221045A
Cited
US3309403A
Cited
US3338961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |