Patents Examined by E. Brendan Magrah
  • Tricyclic pyridone derivatives
    Patent number: 4855297
    Abstract: The compounds of the formula ##STR1## wherein Ra,R.sub.b,R.sub.c R.sub.d are defined in the specification and pharmaceutically acceptable addition salts are disclosed.The compounds of formula I have valuable pharmacological properties and can be used for the control or prevention of illnesses. In particular, they have muscle relevant, seditive-hypnotic, anxiolytic and/or anticonvulsive activity and can accordingly be used in the control or prevention of muscle tensions, stress conditions, isomnia, anxiety states and/or convulsions.
    Type: Grant
    Filed: December 4, 1986
    Date of Patent: August 8, 1989
    Assignee: Hoffman-La Roche Inc.
    Inventors: Ulf Fischer, Fernand Schneider, Widmer Ulrich