Patents by Inventor Colonel R. Dilmore, Jr.

Colonel R. Dilmore, Jr. 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 preparing asbestos-free chlor-alkali diaphragm
    Patent number: 5683749
    Abstract: A method for preparing asbestos-free diaphragms for chlor-alkali electrolytic cells is described. The comprises establishing a liquid permeable diaphragm base mat of fibrous synthetic polymeric material and ion-exchange material on the cathode structure, treating the base mat with strongly alkaline aqueous alkali metal hydroxide having a concentration of from about 15 to about 40 weight percent, and providing a coating of inorganic particulate material on the base mat before the base mat has dried. Preferably, the base mat is coated with the inorganic particulate material using a slurry of the inorganic particulate material suspended in the strongly alkaline aqueous alkali metal hydroxide.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: November 4, 1997
    Assignee: PPG Industries, Inc.
    Inventors: Donald W. DuBois, Colonel R. Dilmore, Jr.
  • Method for preparing diaphragm for use in chlor-alkali cells
    Patent number: 5612089
    Abstract: Asbestos-free diaphragms for chlor-alkali electrolytic cells are prepared by establishing a liquid permeable diaphragm base mat of fibrous synthetic polymeric material on the cathode structure, providing a coating of inorganic particulate material on the base mat, and treating the coated base mat with a nonionic or anionic surfactant. Preferably, the base mat is coated with the inorganic particulate material using a slurry of the inorganic particulate material suspended in an alkali metal halide brine solution containing the surfactant.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: March 18, 1997
    Assignee: PPG Industries, Inc.
    Inventors: Colonel R. Dilmore, Jr., John O. Snodgrass