US3883520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted mercaptoacetamidocephalosporins
Assignee: GlaxoSmithKline LLC
•
Filing: 1973-08-17
•
Granted: 1975-05-13
•
Expires: 1993-08-17
Abstract
Abstract 7-Cyanomethylmercaptoacetamidocephalosporins, 7cyanomethylsulfinylacetamidocephalosporins, and 7cyanomethylsulfonylacetamidocephalosporins, which have antibacterial activity, are disclosed.
Inventors
- 👤 Robert M Demarinis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:37
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/46; C07C; C07C317/00
Claims Analysis
Total Claims: 13
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
11 words
A compound as claimed in claim 1 where n is 0.
Claim 4
Dependent Claim
11 words
A compound as claimed in claim 1 where n is 1.
Claim 5
Dependent Claim
11 words
A compound as claimed in claim 1 where n is 2.
Claim 6
Dependent Claim
40 words
A compound as claimed in claim 2 where X is SHet and Het is tetrazolyl, thiadiazolyl, triazolyl, oxadiazolyl, or pyridyl, unsubstituted or substituted with one or two substituents selected from the group consisting of alkyl of C1-C6, hydroxy, and mercapto.
Claim 7
Dependent Claim
40 words
A compound as claimed in claim 3 where X is SHet and Het is tetrazolyl, thiadiazolyl, triazolyl, oxadiazolyl, or pyridyl, unsubstituted or substituted with one or two substituents selected from the group consisting of alkyl of C1-C6, hydroxy, and mercapto.
Claim 8
Dependent Claim
41 words
A compound as claimed in claim 4 where X is SHet and Het is tetrazolyl, thiadiazolyl, triazolyl, oxadiazolyl, or pyridyl, unsubstituted or substituted with one or two substituents selected from the group consisting of alkyl of C1-C6 , hydroxy, and mercapto.
Claim 9
Dependent Claim
13 words
A compound as claimed in claim 5 being the compound 7-cyanomethylmercaptoacetamido-3-(5-methyl-1,3,4-thiadiazol-2-ylthiomethyl) -3-cephem-4-carboxylic acid.
Claim 10
Dependent Claim
13 words
A compound as claimed in claim 5 being the compound 7-cyanomethylmercaptoacetamido-3-(1-methyltetrazol-5-ylthiomethyl)-3-cephem -4-carboxylic acid.
Claim 11
Dependent Claim
13 words
A compound as claimed in claim 6 being the compound 7-cyanomethylsulfinylacetamido-3-(1-methyltetrazol-5-ylthiomethyl)-3-cephem -4-carboxylic acid.
Claim 12
Dependent Claim
13 words
A compound as claimed in claim 7 being the compound 7-cyanomethylsulfonylacetamido-3-(5-methyl-1,3,4-thiadiazol-2-ylthiomethyl) -3-cephem-4-carboxylic acid.
Claim 13
Dependent Claim
13 words
A compound as claimed in claim 7 being the compound 7-cyanomethylsulfonylacetamido-3-(1-methyltetrazol-5-ylthiomethyl)-3-cephem -4-carboxylic acid.
References Cited (Backward Citations)
US3641021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |