Patent US3917609A successfully refreshed from Google Patents.
US3917609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrroloquinoline carboxylic acids and derivatives
Assignee: 3M Co
•
Filing: 1973-06-27
•
Granted: 1975-11-04
•
Expires: 1993-06-27
Abstract
Abstract Certain substituted 1,2-dihydro-6-oxo-6H-pyrrolo-(3,2,1ij)quinoline-5-carboxylic acids and their salts, and hydrazides thereof, intermediates for and a process for their preparation are described; the end products are active anti-bacterial agents.
Inventors
- 👤 John F Gerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:42
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
5 words
A compound of the formula:
Claim 4
Dependent Claim
5 words
A compound of the formula:
Claim 5
Dependent Claim
10 words
1,2-Dihydro-6-oxo-6H-pyrrolo(3,2,1-ij)quinoline-5-carboxylic acid and pharmaceutically useful salts thereof according to claim
Claim 6
Dependent Claim
6 words
Ethyl 1,2-dihydro-2-methyl-6-oxo-6H-pyrrolo(3,2,1-ij)quinoline-5-carboxylate according to claim 1.
Claim 7
Dependent Claim
14 words
1,2-Dihydro-2-methyl-6-oxo-6H-pyrrolo(3,2,1-ij)-quinoline-5-carboxylic acids and alkali and alkaline earth metal salts thereof according to claim 1.
Claim 8
Dependent Claim
15 words
1,2-Dihydro-2-methyl-7-nitro-6-oxo-6H-pyrrolo-(3,2,1-ij)quinoline-5 -carboxylic acid and alkali and alkaline earth metal salts thereof according to claim 1.
Claim 9
Dependent Claim
15 words
7-Amino-1,2-dihydro-2-methyl-6-oxo-6H-pyrrolo-(3,2,1-ij)quinoline-5 -carboxylic acid and alkali and alkaline earth metal salts thereof according to claim 1.
Claim 10
Dependent Claim
14 words
1,2-Dihydro-7-nitro-6-oxo-6H-pyrrolo(3,2,1-ij)-quinoline-5-carboxylic acid and alkali and alkaline earth metal salts thereof according to claim 1.
Claim 11
Dependent Claim
15 words
7-Acetamido-1,2-dihydro-2-methyl-6-oxo-6H-pyrrolo(3,2,1-ij)quinoline-5 -carboxylic acid and alkali and alkaline earth metal salts thereof according to claim 1.
Claim 12
Dependent Claim
7 words
Ethyl 1,2-dihydro-8-fluoro-2-methyl-6-oxo-6H-pyrrolo(3,2,1-ij)quinoline-5 -carboxylate according to claim 1.
Claim 13
Dependent Claim
15 words
1,2-Dihydro-8-fluoro-2-methyl-6-oxo-6H-pyrrolo-(3,2,1-ij)quinoline-5 -carboxylic acid and alkali and alkaline earth metal salts thereof according to claim 1.
Claim 14
Dependent Claim
7 words
1,2-Dihydro-6-oxo-6H-pyrrolo(3,2,1-ij)quinoline-5-carbonyl hydrazide hydrate according to claim 1.
Claim 15
Dependent Claim
8 words
1,2-Dihydro-6-oxo-6H-pyrrolo(3,2,1-ij)quinoline-5-carboxylic acid 5-nitrofurfurylidene hydrazide according to claim 1.
Claim 16
Dependent Claim
12 words
7-Cyano-1,2-dihydro-2-methyl-6-oxo-6H-pyrrolo-(3,2,1-ij)quinoline-5 -carboxylic acid and pharmaceutically useful salts thereof according to claim 1.
Claim 17
Dependent Claim
12 words
1,2-Dihydro-8-hydroxy-2-methyl-6-oxo-6H-pyrrolo-(3,2,1-ij)quinoline-5 -carboxylic acid and pharmaceutically useful salts thereof according to claim 1.
Claim 18
Dependent Claim
12 words
7-Acetamido-1,2-dihydro-2-ethyl-6-oxo-6H-pyrrolo-(3,2,1-ij)quinoline-5 -carboxylic acid and pharmaceutically useful salts thereof according to claim 1.
Claim 19
Dependent Claim
7 words
1,2-Dihydro-8-fluoro-2-methyl-6-oxo-6H-pyrrolo-(3,2,1-ij)quinoline-5 -carboxyl chloride according to claim 1.
Claim 20
Dependent Claim
6 words
1,2-Dihydro-8-fluoro-2-methyl-6-oxo-6H-pyrrolo-(3,2,1-ij)quinoline-5 -carboxamide 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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |