Patents Represented by Attorney Albert Graddis

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  • Substituted 10-oxo-10H-pyridazino(6,1-b)quinazoline-2-carboxylic acids
    Patent number: 4250177
    Abstract: The invention relates to substituted 10-oxo-10H-pyridazino(6,1-b)quinazoline-2-carboxylic acids having the formula: ##STR1## wherein R.sub.1 is hydrogen, halogen; R.sub.2 is hydrogen, lower alkyl containing one to three carbon atoms, or wherein R.sub.1 and R.sub.2 taken together with the carbon atoms to which they are attached in a benzo ring, and the pharmaceutically acceptable salts thereof. These compounds are useful as anti-allergic agents.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: February 10, 1981
    Assignee: Warner-Lambert Company
    Inventors: Charles F. Schwender, Brooks R. Sunday