Patents by Inventor Don R. Siems

Don R. Siems 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).

  • Liquid polymer containing compositions for thickening aqueous mediums
    Patent number: 4615740
    Abstract: A liquid, polymer-containing composition for viscosifying oilfield brines comprising an oil base liquid, an effective, gelling amount of a gelling agent which is an aluminum phosphate compound and hydroxyethyl cellulose, the compositions preferably containing, in addition, a surfactant to retard settling and hard packing of the hydroxyethyl cellulose.
    Type: Grant
    Filed: March 8, 1985
    Date of Patent: October 7, 1986
    Assignee: NL Industries, Inc.
    Inventors: James A. Pelezo, Garry E. Corbett, Jr., Don R. Siems