US3929779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminopyridinium acetyl cephalosporanes
Assignee: Novartis Corp
•
Filing: 1972-03-30
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Granted: 1975-12-30
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Expires: 1992-03-30
Abstract
Abstract IN WHICH R1 represents an aminopyridinium radical and R2 a heterocyclic radical of aromatic character, bonded to the sulphur atom via a carbon atom, and containing at least 2 nitrogen atoms and additionally a further hetero-atom selected from nitrogen, oxygen and sulphur. They have antimicrobial activity. Compounds of the formula
Inventors
- 👤 Hans Bickel
- 👤 Johannes Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:40
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/75; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/36; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
6 words
COMPOUNDS OF THE GENERAL FORMULA I
Claim 2
Dependent Claim
6 words
COMPOUNDS OF THE GENERAL FORMULA I
Claim 3
Dependent Claim
30 words
Compounds of the formula I as claimed in claim 1, wherein R2 represents a heterocyclic radical of aromatic character with 5 ring atoms, and therapeutically acceptable salts of these compounds.
Claim 4
Dependent Claim
36 words
Compounds of the formula I as claimed in claim 1, wherein R1 represents the para-aminopyridinium radical and R2 represents a heterocyclic radical of aromatic character with 5 ring atoms, and therapeutically acceptable salts of these compounds.
Claim 5
Dependent Claim
22 words
Compounds of the formula I as claimed in claim 1, wherein R1 represents the para-aminopyridinium radical and R2 represents a triazole radical.
Claim 6
Dependent Claim
22 words
Compounds of the formula I as claimed in claim 1, wherein R1 represents the para-aminopyridinium radical and R2 represents a tetrazole radical.
Claim 7
Dependent Claim
20 words
A compound as claimed in claim 1, wherein R1 is para-aminopyridinium and R2 is 1-methyl-tetrazol-5-yl, and therapeutically acceptable salts thereof.
References Cited (Backward Citations)
US3218318A
Cited
US3516997A
Cited
US3641021A
Cited
US3757013A
Cited
US3766175A
Cited
US3759904A
Cited
US3757015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |