Patents by Inventor W. Bruce Darlington

W. Bruce Darlington 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).

  • Patent number: 5114999
    Abstract: Disclosed is a binder insolubilizer for use in binder-containing paper coating compositions, the insolubilizer consisting essentially of an aqueous formulation containing at least about 15 weight percent of titratable glyoxal and at least one polyhydroxy compound.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: May 19, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Sai H. Hui, W. Bruce Darlington
  • Patent number: 4680101
    Abstract: A polymeric metal oxide such as polytitanic acid, polyzirconic acid or polysilicic acid is incorporated into a liquid permeable diaphragm formed of, e.g., asbestos, asbestos and a polymer resin, polytetrafluoroethylene, or a major amount polyfluorocarbon fibrils and a minor amount perfluorinated ion exchange material. Optionally, the diaphragm may also include inorganic materials such as zirconium oxide, titanium dioxide, aluminum oxide, talc, barium sulfate or potassium titanate, and hydrous inorganic gels such as magnesium oxide gel, zirconium oxide gel, titanium oxide gel or zirconyl phosphate gel.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: July 14, 1987
    Assignee: PPG Industries, Inc.
    Inventors: W. Bruce Darlington, Donald W. DuBois
  • Patent number: 4666573
    Abstract: A non-asbestos, electrolyte permeable diaphragm fabricated of thermoplastic organic polymer material containing ion exchange functional groups or precursor groups thereof is disclosed. The diaphragm can be prepared by providing a slurry of the organic polymer material, depositing the organic polymer material upon a cathode substrate and treating the organic polymer material to secure a stable diaphragm.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: May 19, 1987
    Assignee: PPG Industries, Inc.
    Inventors: Donald W. DuBois, Colonel R. Dilmore, W. Bruce Darlington