US3701775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of mandeloylaminocephalosporanic acids
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1970-11-25
•
Granted: 1972-10-31
•
Expires: 1990-11-25
Abstract
Abstract ESTERS OF MANDELAMIDOCEPHALOSPORANIC ACIDS HAVING ANTIBACTERIAL ACTIVITY ARE PREPARED BY CONDENSING THE MANDELAMIDOCEPHALOSPORIN WITH A CARBOXYLIC ACID. PREFERRED COMPOUNDS INCLUDE THOSE WHERE THE CARBOXYLIC ACID IS AN AMINO ACID.
Inventors
- 👤 David A Berges
- 👤 George L Dunn
- 👤 John R E Hoover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:00
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |