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US4340539A Expired / Lapsed US ⏱️ 0.0 years remaining

Derivatives of 6-bromo penicillanic acid

Assignee: Bristol Myers Co
•
Filing: 1980-12-11
•
Granted: 1982-07-20
•
Expires: 2000-12-11
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Abstract

Abstract 2β-Chloromethyl-2α-methylpenam-3α-carboxylic acid sulfone and salts and esters thereof were synthesized and found to be potent inhibitors of β-lactamases.

Inventors

  • 👤 William J. Gottstein

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 22:22
CPC Classifications
C; C07; C07D; C07D499/00

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 12 words
An ester having the formula ##STR59## wherein R is benzyl or p-nitrobenzyl.
Claim 2
Dependent Claim 12 words
An ester having the formula ##STR59## wherein R is benzyl or p-nitrobenzyl.
Claim 3
Dependent Claim 9 words
The ester of claim 1 wherein R is p-nitrobenzyl.
Claim 4
Dependent Claim 13 words
An ester having the formula ##STR60## wherein R is benzyl, p-nitrobenzyl or β,β,β-trichloroethyl.
Claim 5
Dependent Claim 13 words
An ester having the formula ##STR60## wherein R is benzyl, p-nitrobenzyl or β,β,β-trichloroethyl.
Claim 6
Dependent Claim 9 words
The ester of claim 3 wherein R is p-nitrobenzyl.
Claim 7
Dependent Claim 9 words
The ester of claim 3 wherein R is β,β,β-trichloroethyl.
Claim 8
Dependent Claim 6 words
The ester having the formula ##STR61##
Claim 9
Dependent Claim 6 words
The ester having the formula ##STR61##

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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) 1985-07-19 1986-01-18 1986-07-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-07-19 1990-01-18 1990-07-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-07-19 1994-01-18 1994-07-20 $7700.00 Window Closed / Lapsed

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