US2461492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acrylonitrile
Assignee: Wyeth Holdings LLC
•
Filing: 1946-03-19
•
Granted: 1949-02-08
•
Expires: 1966-03-19
Abstract
No abstract record available.
Inventors
- 👤 Erwin L Carpenter
- 👤 Harold S Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:32
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/30; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE496372C
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US1858151A
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DE510712C
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US2082000A
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US2389607A
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US2356247A
Cited
US2374051A
Cited
US2375005A
Cited
US2392303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |