Patents by Inventor William Randall Thompson

William Randall Thompson 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).

  • Aluminizing slurry compositions free of hexavalent chromium, and related methods and articles
    Patent number: 7896962
    Abstract: A slurry coating composition is described, which is very useful for enriching the surface region of a metal-based substrate with aluminum. The composition includes colloidal silica and particles of an aluminum-based powder, and is substantially free of hexavalent chromium. The slurry may include colloidal silica and an alloy of aluminum and silicon. Alternatively, the slurry includes colloidal silica, aluminum or aluminum-silicon, and an organic stabilizer such as glycerol. The slurry exhibits good thermal and chemical stability for extended periods of time, making it very useful for industrial applications. Related methods and articles are also described.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: March 1, 2011
    Assignee: General Electric Company
    Inventors: Lawrence Bernard Kool, Michael Francis Gigliotti, Jr., Stephen Francis Rutkowski, Paul Steven Svec, Anatoli Kogan, Richard DiDomizio, Brian Stephen Noel, David Carr, William Randall Thompson
  • ORGANIC COATING COMPOSITIONS FOR ALUMINIZING METAL SUBSTRATES, AND RELATED METHODS AND ARTICLES
    Publication number: 20090084472
    Abstract: An organic coating composition is described, which can be used to enrich the surface region of a metal-based substrate with aluminum. The composition comprises an aluminum-based powder and at least one organic resin, e.g., alkyds, epoxies, or silicone materials. At least some of the aluminum-based powder is in the form of substantially spherical powder particles. The coating composition is substantially free of hexavalent chromium. It can be applied to the substrate by a variety of techniques, such as spraying. It is then heat-treated, to cause diffusion of aluminum into the surface region of the substrate, e.g., a turbine engine component. The composition exhibits good thermal and chemical stability for extended periods of time. Related articles are also described.
    Type: Application
    Filed: October 20, 2008
    Publication date: April 2, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Michael Francis X. Gigliotti, JR., Lawrence Bernard Kool, Anatoli Kogan, Richard DiDomizio, Brian Stephen Noel, David Carr, William Randall Thompson
  • Organic coating compositions for aluminizing metal substrates, and related methods and articles
    Patent number: 7449241
    Abstract: An organic coating composition is described, which can be used to enrich the surface region of a metal-based substrate with aluminum. The composition comprises an aluminum-based powder and at least one organic resin, e.g., alkyds, epoxies, or silicone materials. At least some of the aluminum-based powder is in the form of substantially spherical powder particles. The coating composition is substantially free of hexavalent chromium. It can be applied to the substrate by a variety of techniques, such as spraying. It is then heat-treated, to cause diffusion of aluminum into the surface region of the substrate, e.g., a turbine engine component. The composition exhibits good thermal and chemical stability for extended periods of time. Related articles are also described.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: November 11, 2008
    Assignee: General Electric Company
    Inventors: Michael Francis X. Gigliotti, Jr., Lawrence Bernard Kool, Anatoli Kogan, Richard DiDomizio, Brian Stephen Noel, David Carr, William Randall Thompson
  • Aluminizing slurry compositions free of hexavalent chromium, and related methods and articles
    Patent number: 7270852
    Abstract: A slurry coating composition is described, which is very useful for enriching the surface region of a metal-based substrate with aluminum. The composition includes colloidal silica and particles of an aluminum-based powder, and is substantially free of hexavalent chromium. The slurry may include colloidal silica and an alloy of aluminum and silicon. Alternatively, the slurry includes colloidal silica, aluminum or aluminum-silicon, and an organic stabilizer such as glycerol. The slurry exhibits good thermal and chemical stability for extended periods of time, making it very useful for industrial applications. Related methods and articles are also described.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: September 18, 2007
    Assignee: General Electric Company
    Inventors: Lawrence Bernard Kool, Michael Francis Gigliotti, Jr., Stephen Francis Rutkowski, Paul Steven Svec, Anatoli Kogan, Richard DiDomizio, Brian Stephen Noel, David Carr, William Randall Thompson
  • Process for removing chromide coatings from metal substrates, and related compositions
    Patent number: 6953533
    Abstract: A method for removing a chromide coating from the surface of a substrate is described. The coating is treated with a composition which includes an acid having the formula HxAF6, where “A” can be Si, Ge, Ti, Zr, Al, or Ga; and x is 1–6. An exemplary acid is hexafluorosilicic acid. The composition may also include a second acid, such as phosphoric acid or nitric acid. In some instances, a third acid is employed, such as hydrochloric acid. A related repair method for replacing a worn or damaged chromide coating is described. The coating is often applied to portions of turbine engine components made from superalloy materials.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: October 11, 2005
    Assignee: General Electric Company
    Inventors: Lawrence Bernard Kool, Kenneth Burrell Potter, William Randall Thompson, David Carr, Kiyokazu Watanabe, Minoru Ishida, Kazuharu Hattori