US4254260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-Substituted-7-substituted alkanamido-3-cephem-4-carboxylic acid compounds
Assignee: Astellas Pharma Inc
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Filing: 1976-06-01
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Granted: 1981-03-03
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Expires: 1996-06-01
Abstract
Abstract 3-Substituted-7-substituted alkanamido-3-cephem-4-carboxylic acid compounds and pharmaceutically acceptable salts thereof which have antimicrobial activities, processes for the preparation thereof, pharmaceutical compositions comprising the same, and methods of using the same therapeutically in the treatment of infections.
Inventors
- 👤 Takao Takaya
- 👤 Takashi Masugi
- 👤 Hisashi Takasugi
- 👤 Hiromu Kochi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:50
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; A; A61; A61P; A61P31/00; A61P31/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
4 words
The compound 3-(5-methyl-1,3,4-thiadiazol-2-yl)thiomethyl-7-(2-trifluoroacetamidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 2
Dependent Claim
4 words
The compound 3-(5-methyl-1,3,4-thiadiazol-2-yl)thiomethyl-7-(2-trifluoroacetamidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 3
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-trifluoroacetamidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 4
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-trifluoroacetamidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 5
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-methanesulfonamidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 6
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-methanesulfonamidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 7
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-benzenesulfonamidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 8
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-benzenesulfonamidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 9
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-ureidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 10
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-ureidothiazol-4-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 11
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-[2-(3-methylureido)thiazol-4-yl]acetamido-3-cephem-4-carboxylic acid.
Claim 12
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-[2-(3-methylureido)thiazol-4-yl]acetamido-3-cephem-4-carboxylic acid.
Claim 13
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-methanesulfonamidothiazol-5-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 14
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-methanesulfonamidothiazol-5-yl)acetamido-3-cephem-4-carboxylic acid.
Claim 15
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-methanesulfonamidothiazol-5-yl)thioacetamido-3-cephem-4-carboxylic acid.
Claim 16
Dependent Claim
4 words
The compound 3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7-(2-methanesulfonamidothiazol-5-yl)thioacetamido-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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |