US4146719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperazinyl derivatives of quinoline carboxylic acids
Assignee: Kyorin Pharmaceutical Co Ltd
•
Filing: 1978-02-16
•
Granted: 1979-03-27
•
Expires: 1998-02-16
Abstract
Abstract This invention relates to new compounds of value as antibacterial agent. More particularly, it relates to piperazinyl derivatives of quinoline carboxylic acids, the hydrates, and the acid addition salts thereof.
Inventors
- 👤 Tsutomu Irikura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:13
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/48; C07D215/54; C07D215/56; A; A61; A61P; A61P31/00; A61P31/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
A compound having the formula ##STR3## the hydrates, and the hydrochloride acid addition salts thereof.
Claim 2
Dependent Claim
15 words
A compound having the formula ##STR3## the hydrates, and the hydrochloride acid addition salts thereof.
Claim 3
Dependent Claim
2 words
1-Ethyl-6-fluoro-1,4-dihydro-7-(1-piperazinyl)-4-oxoquinoline-3-carboxylic acid.
Claim 4
Dependent Claim
2 words
1-Ethyl-6-fluoro-1,4-dihydro-7-(1-piperazinyl)-4-oxoquinoline-3-carboxylic acid.
Claim 5
Dependent Claim
3 words
1-Ethyl-6-fluoro-1,4-dihydro-7-(1-piperazinyl)-4-oxoquinoline-3-carboxylic acid pentahydrate.
Claim 6
Dependent Claim
3 words
1-Ethyl-6-fluoro-1,4-dihydro-7-(1-piperazinyl)-4-oxoquinoline-3-carboxylic acid pentahydrate.
Claim 7
Dependent Claim
3 words
1-Ethyl-6-fluoro-1,4-dihydro-7-(1-piperazinyl)-4-oxoquinoline-3-carboxylic acid hydrochloride.
Claim 8
Dependent Claim
3 words
1-Ethyl-6-fluoro-1,4-dihydro-7-(1-piperazinyl)-4-oxoquinoline-3-carboxylic acid hydrochloride.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |