US4013662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl and benzyl 6,7-dialkoxy-2-methyl-4-oxo-1,2,3,4-tetrahydroquinoline-1-carboxylates
Assignee: Pfizer Inc
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Filing: 1975-11-04
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Granted: 1977-03-22
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Expires: 1995-11-04
Abstract
Abstract The racemic mixture, and the dextrorotatory enantiomer, of a compound of the formula ##STR1## wherein R is alkyl having from one to four carbon atoms or benzyl, and R 1 and R 2 are each alkyl having from one to four carbon atoms, are useful as analgesic and tranquilizing agents in mammals.
Inventors
- 👤 Charles A. Harbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:04
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/22; C07D215/233
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
The racemic mixture of a compound of the formula ##STR18## wherein R is selected from the group consisting of alkyl having from one to four carbon atoms and benzyl; and R 1 and R 2 are each alkyl having from one to four carbon atoms.
Claim 2
Dependent Claim
45 words
The racemic mixture of a compound of the formula ##STR18## wherein R is selected from the group consisting of alkyl having from one to four carbon atoms and benzyl; and R 1 and R 2 are each alkyl having from one to four carbon atoms.
Claim 3
Dependent Claim
16 words
A racemic mixture according to claim 1, wherein R 1 and R 2 are each methyl.
Claim 4
Dependent Claim
11 words
The racemic mixture according to claim 2, wherein R is ethyl.
Claim 5
Dependent Claim
11 words
The racemic mixture according to claim 2, wherein R is benzyl.
Claim 6
Dependent Claim
45 words
The dextrorotatory enantiomer of a compound of the formula ##STR19## wherein R is selected from the group consisting of alkyl having from one to four carbon atoms and benzyl; and R 1 and R 2 are each alkyl having from one to four carbon atoms.
Claim 7
Dependent Claim
45 words
The dextrorotatory enantiomer of a compound of the formula ##STR19## wherein R is selected from the group consisting of alkyl having from one to four carbon atoms and benzyl; and R 1 and R 2 are each alkyl having from one to four carbon atoms.
Claim 8
Dependent Claim
16 words
A dextrorotatory enantiomer according to claim 5, wherein R 1 and R 2 are each methyl.
Claim 9
Dependent Claim
11 words
The dextrorotatory enantiomer according to claim 6, wherein R is ethyl.
Claim 10
Dependent Claim
11 words
The dextrorotatory enantiomer according to claim 6, wherein R is benzyl.
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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |