US3658802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cephalosporine derivatives and process
Assignee: Sanofi Aventis France
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Filing: 1969-06-26
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Granted: 1972-04-25
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Expires: 1989-06-26
Abstract
Abstract THIS INVENTION RELATES TO A CEPHALOSPORINE DERIVATIVE OF THE FORMULA 4-(R1-NH-),8-R2-1,3,4,4A,6,7-HEXAHYDRO-8H-AZETO(2,1-B)- PYRROLO(3,4-D)(1,3)-THIAZINE WHEREIN R1 REPRESENTS THE ACYL OF AN ORGANIC ACID AND R2 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL, SUBSTITUTED ALKYL, ARYL AND SUBSTITUTED ARYL. THESE COMPOUNDS HAVE PARTICULARLY MARKED ANTIBIOTIC PROPERTIES, PARTICULARLY, A REMARKABLE ACTIVITY AGAINST STAPHYLOCOCCI.
Inventors
- 👤 Rene Heymes
- 👤 Gaston Amiard
- 👤 Gerard Nomine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:37
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/38
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |