Patent US4095021A successfully refreshed from Google Patents.
US4095021A
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US
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3-Carbamoyloxymethyl or N-methyl-carbamoyloxymethyl-7-[2-carboxymethoxyimino-2-(fur-2-yl or thien-2-yl)acetamido]ceph-3-em-4-carboxylic acids and derivatives thereof
Assignee: Glaxo Laboratories Ltd
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Filing: 1976-03-18
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Granted: 1978-06-13
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Expires: 1996-03-18
Abstract
Abstract Cephalosporin antibiotics in which the 7 beta -acylamido group has the structure <IMAGE>
Inventors
- 👤 Janice Bradshaw
- 👤 Martin Christopher Cook
- 👤 Gordon Ian Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:22
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/54; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
A compound selected from the group consisting of a cephalosporin antibiotic of the formula ##STR131## wherein R is thienyl or furyl; and R' is hydrogen or methyl and a physiologically acceptable salt, ester or 1-oxide thereof.
Claim 2
Dependent Claim
36 words
A compound selected from the group consisting of a cephalosporin antibiotic of the formula ##STR131## wherein R is thienyl or furyl; and R' is hydrogen or methyl and a physiologically acceptable salt, ester or 1-oxide thereof.
Claim 3
Dependent Claim
12 words
The compound of claim 1 which is (6R,7R)-3-carbamoyloxymethyl-7-[2-carboxymethoxyimino-2-(fur-2-yl) acetamido]ceph-3-em-4-carboxylic acid (syn isomer).
Claim 4
Dependent Claim
12 words
The compound of claim 1 which is disodium (6R,7R)-3-carbamoyloxymethyl-7-[2-carboxymethoxyimino-2-(thien-2-yl) acetamido]ceph-3-em-4-carboxylate (syn isomer).
Claim 5
Dependent Claim
2 words
Pivaloyloxymethyl (6R,7R)-3-carbamoyloxymethyl-7-[2-carboxymethoxyimino-2-(fur-2-yl)acetamido]ceph-3-em-4-carboxylate.
Claim 6
Dependent Claim
2 words
Pivaloyloxymethyl (6R,7R)-3-carbamoyloxymethyl-7-[2-carboxymethoxyimino-2-(fur-2-yl)acetamido]ceph-3-em-4-carboxylate.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |