Patent US3796723A successfully refreshed from Google Patents.
US3796723A
Expired / Lapsed
US
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Cyclodopa derivatives
Assignee: F Hoffmann La Roche AG
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Filing: 1971-10-20
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Granted: 1974-03-12
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Expires: 1991-10-20
Abstract
Abstract N-CARBONYL, THIO OR SULFONYL SUBSTITUTED CYCLODOPA DERIVATIVES WHICH ARE USEFUL AS HYPOTENSIVE, ANTI-PYRETIC AND ANTI-PARKINSON AGENTS, AND A METHOD OF PREPARING THESE CYCLODPOA DERIVATIVES INCLUDING INTERMEDIATES.
Inventors
- 👤 A Kaiser
- 👤 U Wolcke
- 👤 W Koch
- 👤 M Scheer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:33
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/04; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/30; C07D209/42
Claims Analysis
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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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |