US3867379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7-substituted cephalosporanic acid and derivatives thereof
Assignee: ER Squibb and Sons LLC
•
Filing: 1972-06-07
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Granted: 1975-02-18
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Expires: 1992-06-07
Abstract
Abstract Disclosed herein are cephalosporanic acid and derivatives thereof which are substituted in the 7-position, processes for preparing such compounds and the utility thereof. The compounds of the invention have been found to be useful as antibacterial agents.
Inventors
- 👤 Joseph Edward Dolfini
- 👤 Ekkehard Bohme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:39
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/57
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
26 words
A compound in accordance with claim 1 wherein R3 is methyl, X is hydrogen and Y is selected from the group consisting of hydrogen and acetoxy.
Claim 4
Dependent Claim
14 words
A compound in accordance with claim 2 having the name 7-benzalimino-7-methyldesacetoxycephalosporanic acid, p-methoxybenzyl ester.
Claim 5
Dependent Claim
14 words
A compound in accordance with claim 2 having the name 7-benzalimino-7-methylcephalosporanic acid, t-butyl ester.
Claim 6
Dependent Claim
14 words
A compound in accordance with claim 2 having the name 7-benzalimino-7methyldesacetoxycephalosporanic acid, methyl ester.
Claim 7
Dependent Claim
14 words
A compound in accordance with claim 2 having the name 7-benzalimino-7-methyldesAcetoxycephalosporanic acid, benzyl ester.
Claim 8
Dependent Claim
14 words
A compound in accordance with claim 2 having the name 7-benzalimino-7-methyldesacetoxycephalosporanic acid, benzhydryl ester.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |