Patents by Inventor Terrance L. Williams

Terrance L. Williams 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: 4686253
    Abstract: Expanded perlite coated with a composition to render the perlite impervious to water, and a joint compound incorporating the same. The perlite is ground prior to expansion to provide subsequently expanded perlite having a mean particle size from about from about 50 to about 70 microns, the joint compound formed from the perlite having greater uniformity in paint gloss appearance between the painted surface of the joint compound and the painted surface of the gypsum wallboard on which the joint compound is applied.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: August 11, 1987
    Assignee: United States Gypsum Company
    Inventors: Arthur W. Struss, Terrance L. Williams, Lawrence T. Eby
  • Patent number: 4587173
    Abstract: Metal cornerbead for drywall partitions is coated with a water reducible acrylic resin to improve the adhesion of joint compound to it. Aqueous solution of resin may be added to roll-forming lubricant such as hexylene glycol.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: May 6, 1986
    Assignee: United States Gypsum Company
    Inventors: Geronimo E. Lat, Terrance L. Williams
  • Patent number: 4525388
    Abstract: Expanded perlite is produced while simultaneously or substantially simultaneously coating the expanded perlite with an hydrophobic coating material by passing the expanded perlite and heated expander exhaust gases from the expansion chamber through a cooling and coating chamber provided with spray nozzles to provide a stream of atomized coating material onto the expanded perlite, while upstream thereof an air intake and temperature sensor are situated to control the air flow and temperature in the cooling and coating chamber so as to provide proper curing temperatures for the coating material upon the expanded perlite before it is separated from the exhaust gases.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: June 25, 1985
    Assignee: USG Corporation
    Inventors: Thomas E. Rehder, Terrance L. Williams
  • Patent number: 4454267
    Abstract: A lightweight joint compound for use in finishing joints between gypsum wallboards, comprising a filler, a binder, a specially treated expanded perlite, a non-leveling agent, and a thickener.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: June 12, 1984
    Assignee: United States Gypsum Company
    Inventor: Terrance L. Williams
  • Patent number: RE29753
    Abstract: A joint compound which is preferably asbestos-free, for use in finishing joints between wallboards, comprising a filler, a binder, and any two or all three of a water-holding agent; a slip-inducing colloid; and a non-swelling clay having sufficient pseudoplasticity to render the composition non-leveling.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: September 5, 1978
    Assignee: United States Gypsum Company
    Inventor: Terrance L. Williams