Patents Examined by Beth Jayaram
  • Phthalazinones
    Patent number: 6103718
    Abstract: Compounds of formula I wherein R1, R2, R3, R4 and R5 have the means set forth in the description are selective cyclic nucleotide phosphodiesterase (PDE) inhibitors (specifically of type 4), which are effective bronchial therapeutics.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: August 15, 2000
    Assignee: Byk Gulden Lomberg Chemische Fabrik GmbH
    Inventor: Geert Jan Sterk