Patent US3855233A successfully refreshed from Google Patents.
US3855233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-substituted penicillanic acid and derivatives thereof
Assignee: ER Squibb and Sons LLC
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Filing: 1971-09-24
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Granted: 1974-12-17
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Expires: 1991-09-24
Abstract
Abstract Disclosed herein are penicillanic acids and derivatives thereof which are substituted in the 6-position, processes for preparing such compounds and the utility thereof. The compounds of the invention have been found to be useful as antibacterial agents.
Inventors
- 👤 J Dolfini
- 👤 E Bohme
- 👤 W Slusarchyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:47
CPC Classifications
C; C07; C07D; C07D499/00; C07D499/21; C07D499/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
11 words
A compound in accordance with claim 1 wherein R3 is methylthio.
Claim 4
Dependent Claim
14 words
A compound in accordance with claim 2 having the name 6-amino-6-methylthiopenicillanic acid, p-methoxybenzyl ester.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |