Patents by Inventor Patrick E. Hillman

Patrick E. Hillman 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).

  • Halogenation of butadiene polymers in mixed solvents
    Patent number: 4381374
    Abstract: Polybutadiene having high cis-1,4-configuration and dissolved in substantially anhydrous liquid organic solvent is reacted with chlorine, bromine or a mixture thereof. The solvent consists essentially of a mixture of one or more perhalogenated alkanes and one or more partially halogenated alkanes and fine particles of substantially thermoplastic halogenated polybutadiene precipitate from the solvent. The fine particles are separated from the bulk of the solvent.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: April 26, 1983
    Assignee: PPG Industries, Inc.
    Inventor: Patrick E. Hillman
  • Method of forming a permionic membrane
    Patent number: 4361601
    Abstract: Disclosed is a method of preparing a permionic membrane by contacting the permionic membrane with a plasticizer and an electroconductive material, and hot pressing the permionic membrane, the plasticizer, and the electroconductive material.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: November 30, 1982
    Assignee: PPG Industries, Inc.
    Inventors: Patrick E. Hillman, Preston S. White
  • Method for mechanically subdividing rubbery, tacky polymer
    Patent number: 4357444
    Abstract: Rubbery, tacky polymer is mechanically subdivided in the presence of fine particles of substantially thermoplastic halogenated polymer.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: November 2, 1982
    Assignee: PPG Industries, Inc.
    Inventor: Patrick E. Hillman