Patents by Inventor David P. Beach-Coffin

David P. Beach-Coffin 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).

  • Use of vinyl alcohol homopolymer and copolymers for tableting active materials
    Patent number: 4990335
    Abstract: Method of making tablets for active ingredient delivery by compressing a mixture of active ingredient and granular, high viscosity, fully hydrolyzed polyvinyl alcohol or copolymer of vinyl alcohol with methyl acrylate or methyl methacrylate. By use of a crystalline, heat treated polymer, a tablet providing quick active ingredient release is obtained. By using an amorphous, non-heat treated polymer a tablet providing prolonged active ingredient release is obtained. By using blends of crystalline and amorphous polymers, tablets having a range of active ingredient release characteristics can be obtained. The granular, high viscosity, fully hydrolyzed polymers provide flowability, compressibility and processing versatility advantages over conventional tablet binders.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: February 5, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Linda R. Bateman, Robert C. Di Luccio, Clare A. Stewart, Jr., Donna L. Visioli, David P. Beach-Coffin