Patent US3793342A successfully refreshed from Google Patents.
US3793342A
Expired / Lapsed
US
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N-(3,4-dihydroxyphenethyl)-5-oxo-2-pyrrolidinecarboxamide
Assignee: F Hoffmann La Roche AG
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Filing: 1971-10-06
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Granted: 1974-02-19
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Expires: 1991-10-06
Abstract
Abstract PHENETHYLAMIDE DERIVATIVES WHICH ARE N-SUBSTITUTED WITH T-ALKOXYCARBONYL, 5-OXO-2-PYRROLIDINE CARBONYL, PHENYLSULFONYL OR NITROPHENYLTHIO AND ARE USEFUL AS HYPOTENSIVE, ANTIPYRETIC AND ANTI-PARKINSON AGENTS.
Inventors
- 👤 A Kaiser
- 👤 U Wolcke
- 👤 W Koch
- 👤 M Scheer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:38
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/273; C07D207/277; C07D207/28
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |