US3573294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7 - (arylglyoxamido)cephalosporanic acids and their salts and alpha-carbonyl derivatives
Assignee: Glaxo Laboratories Ltd
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Filing: 1968-03-14
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Granted: 1971-03-30
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Expires: 1988-03-14
Abstract
Abstract THE INVENTION RELATES TO ANTIBIOTICS WHICH ARE COMPOUNDS OF THE FORMULA 2-(HOOC-),3-(CH3-COO-CH2-),7-(AR-CO-CO-NH-)-2-CEPHEM IN WHICH AR REPRESENTS AN AROMATIC GROUP HAVING AN ATOMIC WEIGHT SUM OF AT LEAST 78 AND THEIR PHARMACEUTICALLY ACCEPTABLE SALTS AND A-CARBONYL DERIVATIVES.
Inventors
- 👤 Alan Gibson Long
- 👤 Edward Mckenzie Wilson
- 👤 William Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:24
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/26
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |