Patent US3757013A successfully refreshed from Google Patents.
US3757013A
Expired / Lapsed
US
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Derivatives of 7-aminocephalosporanic acid
Assignee: Novartis Corp
•
Filing: 1970-09-28
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Granted: 1973-09-04
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Expires: 1990-09-28
Abstract
Abstract 7-AMINOPYRIDINIUMACETYLAMINO-CEPHALOSPORANIC ACIDS AND DERIVATIVES THEREOF. THE NEW COMPOUNDS HAVE ANTIBACTERIAL PROPERTIES.
Inventors
- 👤 H Bickel
- 👤 J Mueller
- 👤 R Bosshardt
- 👤 H Peter
- 👤 B Fechtig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:35
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
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |