Patent US4014881A successfully refreshed from Google Patents.
US4014881A
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1-Oxo-1H-6-piperidinopyrimido[1,2-a]quinoline-2-carboxylic acids and esters
Assignee: Pfizer Inc
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Filing: 1975-07-10
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Granted: 1977-03-29
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Expires: 1995-07-10
Abstract
Abstract As antiulcer agents, a series of 1-oxo-1H-6-substituted pyrimido[1,2-a]quinoline-2-carboxylic acids and esters of the formula <IMAGE> wherein R1 is alkoxy having from one to two carbon atoms or piperidino; and R2 is hydrogen or alkyl having from one to four carbon atoms; the pharmaceutically acceptable acid addition salts of those compounds wherein R1 is piperidino, and the pharmaceutically acceptable cationic salts of those compounds wherein R2 is hydrogen.
Inventors
- 👤 Saul B. Kadin
- 👤 Peter F. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:13
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/38; A; A61; A61P; A61P1/00; A61P1/04; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A compound having the formula ##STR5## wherein R 2 is selected from the group consisting of hydrogen and alkyl having from one to four carbon atoms, the pharmaceutically-acceptable acid addition salts thereof, and the pharamaceutically-acceptable cationic salts of those compounds wherein R 2 is hydrogen.
Claim 2
Dependent Claim
45 words
A compound having the formula ##STR5## wherein R 2 is selected from the group consisting of hydrogen and alkyl having from one to four carbon atoms, the pharmaceutically-acceptable acid addition salts thereof, and the pharamaceutically-acceptable cationic salts of those compounds wherein R 2 is hydrogen.
Claim 3
Dependent Claim
10 words
The compound of claim 1 wherein R 2 is ethyl.
Claim 4
Dependent Claim
10 words
The compound of claim 1 wherein R 2 is methyl.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |