Patents by Inventor R. James Shields

R. James Shields 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).

  • Polymers for controlling soda ash crystal formation
    Patent number: 4374102
    Abstract: Poly N,N-dimethylaminomethyl acrylamide, when added to clarified trona solutions, improves the crystals subsequently formed from these solutions. Preferably, the poly N,N,-dimethylamino methyl acrylamide crystal modifier is used in conjunction with a water-soluble cationically charged coagulant.
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: February 15, 1983
    Assignee: Nalco Chemical Company
    Inventors: Lawrence J. Connelly, James Kane, R. James Shields
  • High HLB latex polymers
    Patent number: 3997492
    Abstract: Stable water-in-oil emulsion of water soluble polymers are disclosed. The emulsions are formed by selecting a suitable continuous phase consisting of an inert hydrocarbon liquid followed by selecting suitable surfactants based on the properties of the organic liquid.
    Type: Grant
    Filed: January 22, 1975
    Date of Patent: December 14, 1976
    Assignee: Nalco Chemical Company
    Inventors: James Kane, R. James Shields, III