US4258184A
Expired / Lapsed
US
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Cephalosporin derivatives
Assignee: Meiji Seika Kaisha Ltd
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Filing: 1979-03-13
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Granted: 1981-03-24
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Expires: 1999-03-13
Abstract
Abstract Novel cephalosporin derivatives having formulae (V) and (III): <IMAGE> (V) and <IMAGE> (III) wherein R1, R2, R3, R4, R8 and A are defined as in the specification.
Inventors
- 👤 Fumio Kai
- 👤 Takashi Tsuruoka
- 👤 Osamu Makabe
- 👤 Shigeharu Inouye
- 👤 Hitoshi Ikeda
- 👤 Yuzo Kazuno
- 👤 Shokichi Nakajima
- 👤 Shigeo Seki
- 👤 Taro Niida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:27
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/36; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/54; A61K31/542; A61K31/545; A61P; A61P31/00; A61P31/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
32 words
A cephalosporin compound of the formula ##STR189## wherein R 1 represents a hydrogen atom or a hydroxy group, and R 8 represents a 5-carbamoyl-1,3,4-thiadiazol-2-yl or 1-methyl-1,2,3,4-tetrazol-5-yl group and pharmaceutically acceptable salts thereof.
Claim 2
Dependent Claim
32 words
A cephalosporin compound of the formula ##STR189## wherein R 1 represents a hydrogen atom or a hydroxy group, and R 8 represents a 5-carbamoyl-1,3,4-thiadiazol-2-yl or 1-methyl-1,2,3,4-tetrazol-5-yl group and pharmaceutically acceptable salts thereof.
Claim 3
Dependent Claim
20 words
A cephalosporin compound and a pharmaceutically acceptable salt thereof as claimed in claim 1 wherein the compound is 7-{D(-)-α-[2-hydroxy-6-(p-tolyl)pyridine-3-carbonylamino]phenylacetamido}-3-(5-carbamoyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid.
Claim 4
Dependent Claim
20 words
A cephalosporin compound and a pharmaceutically acceptable salt thereof as claimed in claim 1 wherein the compound is 7-{D(-)-α-[2-hydroxy-6-(p-tolyl)pyridine-3-carbonylamino]-p-hydroxyphenylacetamido}-3-(5-carbamoyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid.
Claim 5
Dependent Claim
20 words
A cephalosporin compound and a pharmaceutically acceptable salt thereof as claimed in claim 1 wherein the compound is 7-{D(-)-α-[2-hydroxy-6-(p-tolyl)pyridine-3-carbonylamino]-p-hydroxyphenylacetamido}-3-(1-methyl-1,2,3,4-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid.
Claim 6
Dependent Claim
20 words
A cephalosporin compound and a pharmaceutically acceptable salt thereof as claimed in claim 1 wherein the compound is 7-{D(-)-α[2-hydroxy-6-(p-tolyl)pyridine-3-carbonylamino]phenylacetamido}-3-(1-methyl-1,2,3,4-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid.
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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |