Patents by Inventor David R. McWilliams

David R. McWilliams 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).

  • Method for immobilizing superabsorbent polymer and products derived therefrom
    Patent number: 5419955
    Abstract: The present invention provides super absorbent materials in the form of sheets or fibers made from high melting polymers and having super absorbent polymer material dispersed uniformly throughout. The materials are capable of incorporating large amounts of super absorbent polymer and so demonstrate substantially improved absorbency and retention properties.The superabsorbent materials comprise a matrix material polymer selected from the group consisting of cellulose esters, acrylic acid esters, polyvinyl esters and copolymers of same, particles of superabsorbent material distributed throughout the matrix material and a plasticizer mixed into the matrix material.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: May 30, 1995
    Assignee: Hoechst Celanese Corporation
    Inventors: Kenneth C. Ehrhardt, John B. Hopkins, Jr., Joanne C. Maheras, David R. McWilliams