Patents by Inventor William H. Holley

William H. Holley 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 of producing porous plastic materials
    Patent number: 4076656
    Abstract: Method of producing porous synthetic plastic compositions by blending into a polymer at least about 45 volume percent of a plastic-insoluble, water soluble particulate material and a liquid at processing temperatures, capable of forming channels between the solid particles. The blend is then formed into any desired product such as by calendering, extruding or molding and thereafter the water soluble particulate matter and channel forming liquid are leached with water from the product to form a porous plastic.
    Type: Grant
    Filed: July 20, 1973
    Date of Patent: February 28, 1978
    Assignee: DeBell & Richardson, Inc.
    Inventors: LeRoy A. White, William H. Holley