Patents by Inventor Ruth A. Holmes

Ruth A. Holmes 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).

  • Purifying titanium-bearing slag by promoted sulfation
    Patent number: 4362557
    Abstract: Oxide impurites are removed from the titania slag by: (1) admixing the slag with an alkali metal carbonate, sulfate or chloride, (2) reacting the admixture with SO.sub.3 or mixed SO.sub.2 --O.sub.2 gases at elevated temperature to form sulfates of the impurities and (3) leaching the sulfates from the reaction product with water.
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: December 7, 1982
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Gerald W. Elger, Ruth A. Holmes