Patent US3732247A successfully refreshed from Google Patents.
US3732247A
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US
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3-di-substituted methylene pyrrolidines wherein the 1-or n-lower-alkyl substituent contains at least two carbon atoms
Assignee: AH Robins Co Inc
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Filing: 1970-08-14
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Granted: 1973-05-08
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Expires: 1990-08-14
Abstract
Abstract CERTAIN 3-DI-SUBSTITUTED METHYLENE PYRROLIDINES HAVING A 1- OR N-LOWER-ALKYL SUBSTITUENT HAVING AT LEAST TWO CARBON ATOMS ARE ESPECIALLY EFFECTIVE ANTI-DEPRESSANTS. THE COMPOUNDS HAVE THE FORMULA GIVEN IMMEDIATELY BELOW.
Inventors
- 👤 G Helsley
- 👤 C Lunsford
- 👤 J Richman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:54
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |