Patents by Inventor Donald E. Rivard

Donald E. Rivard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process using alkali fusion for decyanation of tert.-nitriles
    Patent number: 4079061
    Abstract: An improvement in the decyanation of tertiary nitriles comprises the alkali fusion of the nitriles. Exemplary are the preparation of chlorpheniramine and brompheniramine by heating the respective nitriles in liquid sodium or potassium hydroxide at from 100.degree.-200.degree..
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: March 14, 1978
    Assignee: SmithKline Corporation
    Inventors: Charles E. Berkoff, Donald E. Rivard