Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2005-05-10
2009-02-10
Berch, Mark L (Department: 1624)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Heterocyclic carbon compounds containing a hetero ring...
C514S202000, C514S203000, C514S204000, C514S206000, C514S208000, C540S215000, C540S222000, C540S224000, C540S225000, C540S226000, C540S227000, C540S229000
Reexamination Certificate
active
07488724
ABSTRACT:
The invention provides compounds of formula (I):wherein: R1-R4and A have any of the values defined in the specification, and their pharmaceutically acceptable salts, are useful for inhibiting β-lactamase enzymes, for enhancing the activity of β-lactam antibiotics, and for treating β-lactam resistant bacterial infections in a mammal. The invention also provides pharmaceutical compositions, processes for preparing compounds of formula (I), and intermediates useful for the synthesis of compounds of formula (I).
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Buynak John D.
Vogeti Lakshminarayana
Berch Mark L
Scwegman, Lunberg & Woessner, P.A.
Southern Methodist University Foundation for Research
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