US2459128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing nitriles
Assignee: Wyeth Holdings LLC
•
Filing: 1946-05-18
•
Granted: 1949-01-11
•
Expires: 1966-05-18
Abstract
No abstract record available.
Inventors
- 👤 Fahrenbach Marvin Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:15
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/20; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/84; C07D213/85; C07D215/00; C07D215/02; C07D215/16; C07D215/48; C07D215/50; C07D215/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1828267A
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US1876652A
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CH184301A
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DE651611C
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DE706198C
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US2242309A
Cited
US2297811A
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US2387435A
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US2389217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |