US2439359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aminopropionitriles
Assignee: Wyeth Holdings LLC
•
Filing: 1946-01-08
•
Granted: 1948-04-06
•
Expires: 1966-01-08
Abstract
No abstract record available.
Inventors
- 👤 James K Dixon
- 👤 Elmer W Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:44
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07D295/145; C07D295/15; C07C; C07C253/00; C07C253/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE496372C
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US1992615A
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US2211152A
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US2228271A
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US2374052A
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US2328940A
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US2364538A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |