US3865819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted sulfonylacetamido cephalosporins
Assignee: GlaxoSmithKline LLC
•
Filing: 1972-05-03
•
Granted: 1975-02-11
•
Expires: 1992-05-03
Abstract
Abstract Cephalosporin compounds having various substituted sulfonylacetamido groups at position 7 have been prepared and have antibacterial activity.
Inventors
- 👤 Robert M Demarinis
- 👤 John R E Hoover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:12
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
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
5 words
A COMPOUND OF THE STRUCTURE:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE STRUCTURE:
Claim 3
Dependent Claim
14 words
A compound as claimed in claim 1 where X is methyl, ethyl or propyl.
Claim 4
Dependent Claim
32 words
A compound as claimed in claim 2 where Het is tetrazol-5-yl, 1,3,4-thiadiazol-5-yl, 1,2,4-triazol-3-yl, 1,2,3-triazol-5-yl or 1,3,4-oxadiazol-5-yl, each Het group being unsubstituted or substituted with hydroxy or one or two lower alkyl groups.
Claim 5
Dependent Claim
13 words
A compound as claimed in claim 3 being the compound 7-methylsulfonylacetamido-3-(2-methyl-1,3,4-thiadizol-5-ylthiomethyl-3 -cephem-4-carboxylic acid.
Claim 6
Dependent Claim
13 words
A compound as claimed in claim 3 being the compound 7-methylsulfonylacetamido-3-(1-methyltetrazol-5-ylthiomethyl)-3-cephem-4 -carboxylic acid
Claim 7
Dependent Claim
13 words
A compound as claimed in claim 3 being the compound 7-methylsulfonylacetamido-3-(4-methyl-1,2,4-triazol-3-ylthiomethyl) -3-cephem-4-carboxylic acid.
Claim 8
Dependent Claim
13 words
A compound as claimed in claim 3 being the compound 7-methylsulfonylacetamido-3-(5-methyl-1,2,4-triazol-3-ylthiomethyl) -3-cephem-4-carboxylic acid
Claim 9
Dependent Claim
13 words
A compound as claimed in claim 3 being the compound 7-ethylsulfonylacetamido-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3 -cephem-4-carboxylic acid
Claim 10
Dependent Claim
13 words
A compound as claimed in claim 3 being the compound 7-ethylsulfonylacetamido-3-(1-methyltetrazol-5-ylthiomethyl) -3-cephem-4-carboxylic acid.
Claim 11
Dependent Claim
13 words
A compound as claimed in claim 3 being the compound 7-ethylsulfonylacetamido-3-(4-methyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem -4-cephem-4-carboxylic acid.
Claim 12
Dependent Claim
13 words
A compound as claimed in claim 3 being the compound 7-ethylsulfonylacetamido-3-(5-methyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem -4-carboxylic acid.
References Cited (Backward Citations)
US3647788A
Cited
US3657232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |