US3641014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of delta**3-cephalosporin sulfoxides
Assignee: Eli Lilly and Co
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Filing: 1968-10-03
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Granted: 1972-02-08
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Expires: 1988-10-03
Abstract
Abstract PROCESS FOR REDUCING CEPHALOSPORIN SULFOXIDES WITH CERTAIN REDUCING AGENTS IN THE PRESENCE OR ABSENCE OF ACID HALIDE ACTIVATORS TO PRODUCE CEPHALOSPORINS USEFUL IN AN OVERALL PROCESS FOR THE MANUFACTURE OF CEPHALOSPORIN ANTIBIOTICS, E.G., CEPHALOTHIN, CEPHALOGLYCIN, AND THE LIKE, FROM PENICILLINS.
Inventors
- 👤 Charles F Murphy
- 👤 J Alan Webber
- 👤 Gary V Kaiser
- 👤 Earle M Van Heyningen
- 👤 Ian G Wright
- 👤 Robin D G Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; B; B65; B65G; B65G43/00; B65G43/08; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/44; C07D501/02; C07D501/04
Claims Analysis
Total Claims: 0
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |