US3644399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrrole lower alkanoic acids and derivatives
Assignee: John Wyeth and Brother Ltd
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Filing: 1969-05-01
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Granted: 1972-02-22
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Expires: 1989-05-01
Abstract
Abstract THE INVENTION CONCERNS DIARYL FURAN, THIOPHENE, AND PYRROLE LOWER ALKANOIC ACIDS AND DERIVATIVES WHICH ARE PHARMACOLOGICALLY EFFICACIOUS AS ANTI-INFLAMMATORY AGENTS.
Inventors
- 👤 Kevan Brown
- 👤 John Frederick Cavalla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:12
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/32; C07D207/33; C07D207/337; C07C; C07C59/00; C07C59/40; C07C59/76; C07C59/84; C07C59/88; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/54; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/24
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |