US3385891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of amides and amidines
Assignee: Union Oil Company of California
•
Filing: 1965-05-13
•
Granted: 1968-05-28
•
Expires: 1985-05-13
Abstract
No abstract record available.
Inventors
- 👤 Donald M Fenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:36
CPC Classifications
C; C07; C07C; C07C231/00; C07B; C07B35/00; C07B35/04; C07C233/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3121084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |