Patents by Inventor Danford H. Olson

Danford H. Olson 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).

  • Polymeric viscosity index improver and oil composition comprising the same
    Patent number: 4788361
    Abstract: A triblock copolymer VI improver comprising terminal hydrogenated polyisoprene blocks and a central polymeric block containing predominantly monoalkenyl aromatic hydrocarbon monomer units. Oil compositions comprising such triblock copolymer VI improvers exhibit a good balance between thickening efficiency and mechanical shear stability combined with relatively high HTHSR viscosities.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: November 29, 1988
    Assignee: Shell Oil Company
    Inventors: Danford H. Olson, Dale L. Handlin