US3741963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water soluble n-carboxy derivatives of cephradine and cephalexin and a method for their preparation
Assignee: ER Squibb and Sons LLC
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Filing: 1971-07-28
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Granted: 1973-06-26
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Expires: 1991-07-28
Abstract
Abstract N-CARBOSY DERIVATIVES OF CEPHRADINE AND OF CEPHALEXIN ARE PROVIDED WHICH ARE READILY WATER SOLUBLE AND ARE USEFUL AS ANTIBIOTICS WHICH MAY BE ADMINISTERED PARENTERALLY.
Inventors
- 👤 F Dursch
- 👤 O Kocy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:24
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/22
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |