US2846376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of triethylamine
Assignee: Wyeth Holdings LLC
•
Filing: 1953-05-22
•
Granted: 1958-08-05
•
Expires: 1973-05-22
Abstract
No abstract record available.
Inventors
- 👤 Mccormick Jerry Robert Daniel
- 👤 Hoffer Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:49
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/82; C07C209/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2249816A
Cited
US2237628A
Cited
US2348683A
Cited
US2413245A
Cited
US2512584A
Cited
US2512585A
Cited
US2527017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |