GB9823103D0 — Pharmaceutically active compounds
Assigned to Pfizer Ltd Great Britain · Expires 1998-12-16 · 27y expired
What this patent protects
There is provided compounds of formula IA and of formula IB, <CHEM> wherein R<1>, R<2>, R<3>, R<4> and A have meanings given in the description, which are useful in the curative and prophylactic treatment of a medical condition for which inhibition o…
USPTO Abstract
There is provided compounds of formula IA and of formula IB, <CHEM> wherein R<1>, R<2>, R<3>, R<4> and A have meanings given in the description, which are useful in the curative and prophylactic treatment of a medical condition for which inhibition of a cyclic guanosine 3',5'-monophosphate phosphodiesterase (e.g. cGMP PDE5) is desired.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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