Patent US3721676A successfully refreshed from Google Patents.
US3721676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 3-amino-2(1h)pyridones
Assignee: Merck and Co Inc
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Filing: 1970-06-11
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Granted: 1973-03-20
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Expires: 1990-06-11
Abstract
Abstract NOVEL SECONDARY AND TERTIARY AMINOPYRIDONES USEFUL AS ANTIINFLAMMATORY, ANALGESIC AND ANTIPYRETIC AGENTS.
Inventors
- 👤 B Witzel
- 👤 T Shen
- 👤 A Pessolano
- 👤 P Graham
- 👤 R Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:35
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89; C07D213/04; C07D213/60; C07D213/61; C07D213/62; C07D213/63; C07D213/64; C07D213/65; C07D213/69; C07D213/70; C07D213/71; C07D213/72; C07D213/73; C07D213/74; C07D213/78; C07D213/79; C07D213/80; C07D213/81; C07D213/82; C07D213/84; C07D213/85
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |