Patent US3686172A successfully refreshed from Google Patents.
US3686172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 7-(5-aminotetrazolylacetylamino)-cephalosporanic acid
Assignee: Novartis Corp
•
Filing: 1969-12-08
•
Granted: 1972-08-22
•
Expires: 1989-12-08
Abstract
Abstract 7 - (5 - AMINOTETRAZOLYLACETYLAMINO)-CEPHALOSPORANIC ACID AND DERIVATIVES THEREOF. USE: ANTIBIOTICS.
Inventors
- 👤 Hans Bickel
- 👤 Johannes Mueller
- 👤 Rolf Bosshardt
- 👤 Heinrich Peter
- 👤 Bruno Fechtig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:30
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; B; B60; B60Q; B60Q7/00; C07D501/24; C07D501/26; C07D501/34
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |