Patent US3853897A successfully refreshed from Google Patents.
US3853897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 1-substituted-3-amino-1(2h)pyridones
Assignee: Merck and Co Inc
•
Filing: 1973-01-04
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Granted: 1974-12-10
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Expires: 1993-01-04
Abstract
Abstract Novel primary aminopyridones useful as antiinflammatory, analgesic and antipyretic agents.
Inventors
- 👤 P Graham
- 👤 R Clark
- 👤 B Witzel
- 👤 T Shen
- 👤 A Pessolano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:43
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/60; C07D213/62; C07D213/63; C07D213/64; C07D213/70; C07D213/71; C07D213/72; C07D213/73; C07D213/75; C07D213/78; C07D213/81; C07D213/82; C07D213/84; C07D213/85; C07D213/89
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
5 words
3-Amino-1-methylethylaminoethyl-4-methyl-6-t-butyl-2(1H)-pyridone according to claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |