US3991053A
Expired / Lapsed
US
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Antibacterial 1,3-dihydrofuro[3,4-b]quinoxaline 4,9-dioxides
Assignee: Pfizer Inc
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Filing: 1975-08-06
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Granted: 1976-11-09
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Expires: 1995-08-06
Abstract
Abstract Novel 1-substituted 1,3-dihydrofuro[3,4-b]quinoxaline 4,9-dioxides are useful as antimicrobial agents, and as agents for promoting growth and feed efficiency in animals.
Inventors
- 👤 Leonard J. Czuba
- 👤 John P. Dirlam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:37
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/36; C07D241/50; C07D241/52; A; A23; A23K; A23K20/00; A23K20/10; A23K20/116; A61; A61P; A61P31/00; A61P31/04; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/12; C07D491/00; C07D491/02; C07D491/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
27 words
A compound of the formula ##SPC8## wherein R 1 is selected from the group consisting of hydrogen, alkyl having from one to six carbon atoms and benzyl.
Claim 2
Dependent Claim
27 words
A compound of the formula ##SPC8## wherein R 1 is selected from the group consisting of hydrogen, alkyl having from one to six carbon atoms and benzyl.
Claim 3
Dependent Claim
11 words
The compound according to claim 1, wherein R 1 is hydrogen.
Claim 4
Dependent Claim
11 words
The compound according to claim 1, wherein R 1 is methyl.
References Cited (Backward Citations)
US3344022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |