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US2477937A
Expired / Lapsed
US
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N-hydrocarbon 3-piperidinols
Assignee: Rhone Poulenc SA
•
Filing: 1946-07-02
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Granted: 1949-08-02
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Expires: 1966-07-02
Abstract
No abstract record available.
Inventors
- 👤 Paul Raymond
- 👤 Roy Gustave Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:50
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE292871C
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DE571227C
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US1567200A
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US1790042A
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DE568759C
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US2192840A
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US2265201A
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US2369611A
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US2421729A
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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) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |