Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2007-08-28
2007-08-28
Berch, Mark L. (Department: 1624)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Heterocyclic carbon compounds containing a hetero ring...
C514S262100, C514S252160, C544S262000, C544S118000
Reexamination Certificate
active
10834484
ABSTRACT:
The present invention comprises a class of 5,7-diaminopyrazolo[4,3-d]pyrimidine compounds. These compounds are useful as phosphodiesterase type 5 inhibitors. The present invention further comprises compositions containing the compounds use of the compounds and compositions to treat hypertension and other conditions, processes for the preparation of the compounds, and intermediates used in the preparation of the compounds.
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Bell Andrew Simon
Brown David Graham
Fox David Nathan Abraham
Marsh Ian Roger
Morrell Andrew Ian
Benson Gregg C.
Berch Mark L.
Moore Susanna
Pfizer Inc.
Samuels Lisa A.
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