US3948905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted sulfonylacetamido cephalosporins
Assignee: GlaxoSmithKline LLC
•
Filing: 1974-12-03
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Granted: 1976-04-06
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Expires: 1994-12-03
Abstract
Abstract Cephalosporin compounds having various substituted sulfonylacetamido groups at position 7 have been prepared and have antibacterial activity.
Inventors
- 👤 Robert M. De Marinis
- 👤 John R. E. Hoover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:30
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: 6
Claim 1
Independent Claim
35 words
A compound of the structure: ##SPC2## where: X is phenyl; A is hydrogen, methyl, acetoxymethyl, or pyridiniummethyl; and M is hydrogen, alkali metal cation, nontoxic ammonium cation, or when A is pyridinummethyl an anionic charge.
Claim 2
Dependent Claim
35 words
A compound of the structure: ##SPC2## where: X is phenyl; A is hydrogen, methyl, acetoxymethyl, or pyridiniummethyl; and M is hydrogen, alkali metal cation, nontoxic ammonium cation, or when A is pyridinummethyl an anionic charge.
Claim 3
Dependent Claim
12 words
A compound as claimed in claim 1 being the compound 7-phenylsulfonylacetamido-3-methyl-3-cephem-4-carboxylic acid.
Claim 4
Dependent Claim
12 words
A compound as claimed in claim 1 being the compound 7-phenylsulfonylacetamido-3-cephem-4-carboxylic acid.
Claim 5
Dependent Claim
12 words
A compound as claimed in claim 1 being the compound 7-phenylsulfonylacetamidocephalosporanic acid.
Claim 6
Dependent Claim
12 words
A compound as claimed in claim 1 being the compound 7-phenylsulfonylacetamido-3-(1-pyridiniummethyl)-3-cephem-4-carboxylic acid.
References Cited (Backward Citations)
US3382238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |