Patent US3753993A successfully refreshed from Google Patents.
US3753993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,4-dihydro-4-oxo-7-pyridyl-3-quinoline-carboxylic acid derivatives
Assignee: STWB Inc
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Filing: 1971-05-17
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Granted: 1973-08-21
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Expires: 1991-05-17
Abstract
Abstract 1,4-DIHYDRO-1-(LOWER-ALKYL)-4-OXO - 7 - PYRIDYL-3-QUINOLINECARBOXYLIC ACIDS AND LOWER-ALKYL ESTERS HAVING ANTIBACTERIAL ACTIVITY, ARE PREPARED BY REACTING THE CORRESPONDING 1,4-DIHYDRO-4-OXO-7-PYRIDYL-3-QUINOLINECARBOXYLIC ACID OR LOWER-ALKYL ESTER WITH AN ALKYLATING AGENT, E.G., LOWER-ALKYL HALIDE, SULFATE OR SULFONATE, AND BY OTHER METHODS.
Inventors
- 👤 G Lesher
- 👤 P Carabateas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:04
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; A; A61; A61P; A61P31/00; A61P31/04; C07D211/00; C07D211/02; C07D211/04; C07D211/80; C07D211/84; C07D211/90; C07D213/26; C07D213/36; C07D213/38; C07D213/44; C07D213/46; C07D213/48; C07D213/60; C07D213/62; C07D213/63; C07D213/64; C07D213/78; C07D213/79; C07D213/80; C07D213/84; C07D213/85; C07D213/89; C07D229/00; C07D401/00; C07D401/02; C07D401/04
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |