US4996313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penicillins
Assignee: BTG International Ltd
•
Filing: 1989-11-17
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Granted: 1991-02-26
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Expires: 2009-11-17
Abstract
Abstract A compound of formula II: <IMAGE> (II) wherein R is hydrogen or an alkyl group and R' is an alkoxy group, and salts and esters thereof.
Inventors
- 👤 Jack E. Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:51
CPC Classifications
C; C12; C12P; C12P37/00; C07; C07D; C07D499/00; C12N; C12N1/00; C12N1/14; C12N1/145; C12R; C12R2001/00; C12R2001/645; C12R2001/745; C12R2001/75
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
39 words
A compound of Formula II: ##STR7## wherein R is hydrogen or an alkyl group of 1 to 5 carbon atoms and R' is an alkoxy group of 1 to 5 carbon atoms, and pharmaceutically acceptable salts and esters thereof.
Claim 2
Dependent Claim
39 words
A compound of Formula II: ##STR7## wherein R is hydrogen or an alkyl group of 1 to 5 carbon atoms and R' is an alkoxy group of 1 to 5 carbon atoms, and pharmaceutically acceptable salts and esters thereof.
Claim 3
Dependent Claim
13 words
A compound according to claim 1 in which R represents a methyl group.
Claim 4
Dependent Claim
13 words
A compound according to claim 1, in which R' represents a methoxy group.
Claim 5
Dependent Claim
11 words
A compound according to claim 1 which is 2-methoxy-2-methyl-6-amino-3-carboxypenam or 2-methoxy-6-amino-3-carboxypenam.
Claim 6
Dependent Claim
29 words
A compound according to claim 1 in which the alkoxy group at the 2-position has the 2S-conformation and the carboxy group at the 3-position has a similar special disposition.
Claim 7
Dependent Claim
1 words
2S-2-methoxy-2-methyl-6-amino-3-carboxypenam.
Claim 8
Dependent Claim
1 words
2S-2-methoxy-2-methyl-6-amino-3-carboxypenam.
Claim 9
Dependent Claim
17 words
The compound according to claim 1, wherein said pharmaceutically acceptable ester is a phenyl or alkyl ester.
Claim 10
Dependent Claim
15 words
The compound according to claim 1, wherein said pharmaceutically acceptable ester is the phenyl ester.
Claim 11
Dependent Claim
24 words
The compound according to claim 1, wherein said pharmaceutically acceptable ester is the methyl, ethyl, propyl, isopropyl, benzyl, diphenylmethyl, benzyloxymethyl, 2,2,2-trichloroethyl or trimethylsilyl ester.
References Cited (Backward Citations)
US3399207A
Cited
EP0174129A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |