Patent US3748341A successfully refreshed from Google Patents.
US3748341A
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US
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Process of preparing 1-substituted-2-aminomethylpyrrolidines and intermediates therefor
Assignee: SCIENT ET IND DE I IIE DE FR S
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Filing: 1971-07-14
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Granted: 1973-07-24
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Expires: 1991-07-14
Abstract
Abstract 1-ALKYL-2-AMINOMETHYLPYRROLIDINES AND 1-BENZYL-2-AMINOMETHYLPYRROLIDINES ARE UTILIZED FOR THE PRODUCTION OF PHARMACEUTICALS. THE PRESENTLY USED PROCESS FOR PRODUCING SUCH COMPOUNDS INVOLVES SIGNIFICANT CONTAMINATION BY UNDESIRED BY-PRODUCTS. THE PROCESS OF THIS INVENTION AVOIDS SUCH CONTAMINATION BY THE UTILIZATION OF NOVEL INTERMEDIATES.
Inventors
- 👤 T Kamiya
- 👤 M Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:50
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/04; C07D207/08; C07D207/09; 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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |