US3948927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,2-Dimethyl-3R-carboxy-6S-amino-1-oxa-4-aza-5R-bicyclo-[3,2,0]heptan-7-one
Assignee: Queen's University
•
Filing: 1974-08-12
•
Granted: 1976-04-06
•
Expires: 1994-08-12
Abstract
Abstract The title compound is produced by chemical synthesis and, if desired, converted as by N-phenylacetylation to a new beta -lactam antibiotic such as oxapenicillin G.
Inventors
- 👤 Saul Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:24
CPC Classifications
C; C07; C07D; C07D499/00; C07D205/00; C07D205/02; C07D205/06; C07D205/08; C07D503/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
The compound of the formula ##EQU81##
Claim 2
Dependent Claim
6 words
The compound of the formula ##EQU81##
Claim 3
Dependent Claim
17 words
A nontoxic, pharmaceutically acceptable metallic, ammonium or substituted ammonium salt of the compound of the formula ##EQU82##
Claim 4
Dependent Claim
17 words
A nontoxic, pharmaceutically acceptable metallic, ammonium or substituted ammonium salt of the compound of the formula ##EQU82##
References Cited (Backward Citations)
US3682896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |