Patents by Inventor Robert L. Snook

Robert L. Snook 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).

  • Refractory coating for making refractory shells
    Patent number: 4948765
    Abstract: This invention relates to refractory coatings and their use. The refractory coating comprises:(1) a carrier, generally water;(2) an alpha alumina monohydrate;(3) an aluminum hydroxyhalide; and(4) a refractory material.The refractory coatings are used for coating patterns which are used to make refractory shells.
    Type: Grant
    Filed: March 10, 1989
    Date of Patent: August 14, 1990
    Assignee: Ashland Oil, Inc.
    Inventor: Robert L. Snook
  • Refractory compositions and evaporative pattern casting process using same
    Patent number: 4854367
    Abstract: An improved expendable pattern casting process and an improved refractory composition for coating expendable patterns used in the process comprising substantially spherical refractory material and an inorganic binder selected from the group consisting of aluminum phosphate, sodium silicate and potassium silicate.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: August 8, 1989
    Assignee: Ashland Oil, Inc.
    Inventor: Robert L. Snook
  • Evaporative pattern casting process
    Patent number: 4785870
    Abstract: An improved expendable pattern casting process and an improved refractory composition for coating expendable patterns used in the process containing substantially spherical refractory material.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: November 22, 1988
    Assignee: Ashland Oil, Inc.
    Inventor: Robert L. Snook