Patent US3199932A successfully refreshed from Google Patents.
US3654291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 3-amino-2(1h)-pyridones
Assignee: Merck and Co Inc
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Filing: 1969-11-12
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Granted: 1972-04-04
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Expires: 1989-11-12
Abstract
Abstract NOVEL PRIMARY AND TERIARY AMINOPYRIDONES USEFUL AS ANTIIMFLAMMATORY, ANALGESIC AND ANTIPYRETIC AGENTS.
Inventors
- 👤 Bruce E Witzel
- 👤 Tsung-Ying Shen
- 👤 Patricia M Graham
- 👤 Robert L Clark
- 👤 Arsenio A Pessolano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:59
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/63; C07D213/64; C07D213/61; C07D213/70; C07D213/72; C07D213/73; C07D213/75; C07D213/78; C07D213/81; C07D213/82; C07D213/84; C07D213/85; C07D213/89
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |