US4337197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O-sulfated β-lactam hydroxamic acids and intermediates
Assignee: ER Squibb and Sons LLC
•
Filing: 1980-10-31
•
Granted: 1982-06-29
•
Expires: 2000-10-31
Abstract
Abstract Antibacterial activity is exhibited by β-lactams having a sulfate substituent in the 1-position and an acylamino substituent in the 3-position.
Inventors
- 👤 Eric M. Gordon
- 👤 Miguel A. Ondetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:56
CPC Classifications
C; C07; C07D; C07D205/00; C07D205/02; C07D205/06; C07D205/08; C07D205/085; A; A61; A61P; A61P31/00; A61P31/04; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A β-lactam having the formula ##STR46## wherein R 3 and R 4 are the same or different and each is hydrogen or alkyl and Y is benzyl or pivaloyl.
Claim 2
Dependent Claim
29 words
A β-lactam having the formula ##STR46## wherein R 3 and R 4 are the same or different and each is hydrogen or alkyl and Y is benzyl or pivaloyl.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |