Patents by Inventor Leroy F. Thompson

Leroy F. 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).

  • Magnesium oxide castable refractory foundry ladle liners
    Patent number: 9422195
    Abstract: Refractory foundry ladle liners made from castable magnesium oxide-based compositions are disclosed. The liner compositions include MgO-containing aggregate, Al2O3-containing aggregate, and an inorganic binder. The ladle liners are cast into shape, placed into ladle shells, and packed with sand. The foundry ladle assemblies, including the pre-cast MgO-based ladle liners, are reusable for multiple foundry operations.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: August 23, 2016
    Assignee: Universal Refractories, Inc.
    Inventors: William J. Chilli, Leroy F. Thompson