Patent US3673193A successfully refreshed from Google Patents.
US3673193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-oxo-1,8-naphthyridine-3-carboxylates and derivatives thereof
Assignee: STWB Inc
•
Filing: 1970-05-11
•
Granted: 1972-06-27
•
Expires: 1990-05-11
Abstract
Abstract 4-Oxo-1-substituted-1,8-naphthyridine-3-carboxylic acid derivatives, having antibacterial properties, prepared by 1alkylating corresponding 4-hydroxy-1,8-naphthyridine-3-carboxylic acid derivatives.
Inventors
- 👤 George Y Lesher
- 👤 Monte D Gruett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:16
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
6 words
7-Acetoxymethyl-1-ethyl-4-oxo-1,8-naphthyridine-3-carboxylic acid according to claim 1.
Claim 2
Dependent Claim
6 words
7-(Diethylaminoacetoxymethyl)-1-ethyl-4-oxo-1,8-naphthyridine-3-carboxylic acid according to claim 1.
Claim 3
Dependent Claim
6 words
7-Chloroacetoxymethyl-1-ethyl-4-oxo-1,8-naphthyridine-3-carboxylic acid according to claim 1.
Claim 4
Dependent Claim
6 words
7-Acetoxymethyl-1-n-propyl-4-oxo-1,8-naphthyridine-3-carboxylic acid according to claim 1.
Claim 5
Dependent Claim
6 words
7-Dichloroacetoxymethyl-1-ethyl-4-oxo-1,8-naphthyridine-3-carboxylic acid according to claim 1.
Claim 6
Dependent Claim
6 words
7-Isobutyroxymethyl-1-ethyl-4-oxo-1,8-naphthyridine-3-carboxylic acid according to claim 1.
Claim 7
Dependent Claim
6 words
1-Ethyl-4-oxo-7-succinoxymethyl-1,8-naphthyridine-3-carboxylic acid according to claim 1.
Claim 8
Dependent Claim
6 words
1-Ethyl-4-oxo-7-propionoxymethyl-1,8-naphthyridine-3-carboxylic acid according to claim 1.
Claim 9
Dependent Claim
6 words
7-Butyroxymethyl-1-ethyl-4-oxo-1,8-naphthyridine-3-carboxylic acid 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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |