US3812110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7-(1,4-cyclohexadienyl-acylamino)cephalosporins
Assignee: ER Squibb and Sons LLC
•
Filing: 1972-08-21
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Granted: 1974-05-21
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Expires: 1992-08-21
Abstract
Abstract THIS INVENTION RELATES TO NEW CEPHALOSPORIN DERIVATIVES AND METHODS FOR PREPARING THE SAME, SAID DERIVATIVES HAVING THE STRUCTURE 1-(R-CH=N-CH(-CO-Y)-)CYCLOHEXA-1,4-DIENE AND 1-(R-CH2-NH-CH(-CO-Y)-)CYCLOHEXA-1,4-DIENE WHEREIN Y IS 7-ACA OR 7-ADCA, OR AN ESTER OR SALT THEREOF, AND R IS PHENYL, SUBSTITUTED PHENYL, NAPHTHYL, SUBSTITUTED ANPHTHYL, LOWER ALKYL OR CYCLOAKYL. THESE COMPOUNDS ARE USEFUL AS ANTIBACTERIAL AGENTS.
Inventors
- 👤 B Mukherjee
- 👤 G Miraglia
- 👤 H Basch
- 👤 B Lee
- 👤 D Ryu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:28
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/22; C07D501/24; C07D501/26; C07D501/28
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |