Patents Represented by Attorney Edward L. Madell

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  • Compositions comprising arylene substituted poly(orthoesters) containing useful agents
    Patent number: 4186185
    Abstract: This invention concerns polymeric orthoesters having a repeating mer comprising a hydrocarbon radical and an orthoester functionality of the general formula: ##STR1## wherein R.sub.1 is a monovalent radical, R.sub.2 is a hydrocarbon radical, a is 2 to 3, and n is at least 10. The polymers are useful for making articles of manufacture and as coatings for beneficial agents.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: January 29, 1980
    Assignee: Alza Corporation
    Inventor: Richard C. Capozza