Patents by Inventor John W. Scheffel

John W. Scheffel 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).

  • Inhibiting wax deposition from a wax-containing oil
    Patent number: 4045360
    Abstract: A method for inhibiting the deposition of wax onto a solid surface from wax-containing petroleum and other wax-containing oils in contact with such solid surface comprising adding to such oils a synergistic mixture of a copolymer of ethylene and a monoethylenically unsaturated ester and one or more fatty derivatives, such as a high molecular weight alcohol, a natural wax, or a fatty acid.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: August 30, 1977
    Assignee: Union Oil Company of California
    Inventors: Paul W. Fischer, John W. Scheffel
  • Method of treating a subterranean formation with a polymeric diverting agent
    Patent number: 4005753
    Abstract: A water-insoluble particulate composition having controlled slow oil-solubility at temperatures in excess of 350.degree. F. is disclosed. The composition is comprised of solid particles of a homogeneous mixture of (1) polyethylene, ethylene-vinyl acetate copolymer containing about 15 to 30 weight percent vinyl acetate, or admixtures of these polymers; (2) a polyamide having a melting point of between about 400.degree. F. and 460.degree. F.; and (3) a softening agent such as a long chain aliphatic diamide having a melting point between about 280.degree. F. and 300.degree. F., or a polyterpene resin having a melting point of between 230.degree. F. and 275.degree. F. Also disclosed is a method of using this particulate composition in well drilling and treating operations where formation temperatures of 350.degree. F. or above are encountered.
    Type: Grant
    Filed: March 4, 1976
    Date of Patent: February 1, 1977
    Assignee: Union Oil Company of California
    Inventors: John W. Scheffel, Paul W. Fischer
  • Polymeric diverting agent
    Patent number: 3954629
    Abstract: A water-insoluble particulate composition having controlled slow oil-solubility at temperatures in excess of 350.degree. F. is disclosed. The composition is comprised of solid particles of a homogeneous mixture of (1) polyethylene, ethylene-vinyl acetate copolymer containing about 15 to 30 weight percent vinyl acetate, or admixtures of these polymers; (2) a polyamide having a melting point of between about 400.degree. and 460.degree. F.; and (3) a softening agent such as a long chain aliphatic diamide having a melting point between about 280.degree. and 300.degree. F., or a polyterpene resin having a melting point of between 230.degree. and 275.degree. F. Also disclosed is a method of using this particulate composition in well drilling and treating operations where formation temperatures of 350.degree. F. or above are encountered.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: May 4, 1976
    Assignee: Union Oil Company of California
    Inventors: John W. Scheffel, Paul W. Fischer