US3296258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7-(imidazolidinyl-butyryl)-aminocephalosporanic acids
Assignee: BASF Corp
•
Filing: 1964-08-05
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Granted: 1967-01-03
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Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 Vischer Ernst
- 👤 Fechtig Bruno
- 👤 Bickel Hans
- 👤 Bosshardt Rolf
- 👤 Urech Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:05
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/26; C07D501/34; C07D501/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF 7(4-(1-LOWER ALKENYL-2-THIONO-5-OXO-IMIDAZOLIDINE - 4 - YL)BUTYRYL)-AMINO-CEPHALOSPORANIC ACID AND ITS THEREAPEUTICALLY ACCEPTABLE SALTS WITH ORGANIC TERTIARY NITROGEN BASES OR METALS.
References Cited (Backward Citations)
US3227712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |