Patents by Inventor Ralph H. Rygg

Ralph H. Rygg 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).

  • Stabilization of modified cellulose in brines at high temperatures
    Patent number: 4359392
    Abstract: Novel processes are provided for the stabilization of modified celluloses in brine solutions useful for well completion and workover. Copper species are added to such fluids in an amount effective substantially to decrease the rate of decomposition of such cellulose at temperatures above about 225.degree. F.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: November 16, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Ralph H. Rygg