Patents by Inventor Yoon S. Song

Yoon S. Song 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).

  • Process for the preparation of acrylate and methacrylate polymers
    Patent number: 6013735
    Abstract: A continuous process for the preparation of linear, branched and star-polymers via anionic polymerization of acrylic monomers, linear, branched and star-polymers obtained by the process and lubricating oil compositions thereof.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: January 11, 2000
    Assignee: Ethyl Corporation
    Inventors: Munmaya K. Mishra, Yoon S Song, Akhilesh Duggal
  • Increasing viscosity storage stabiity of Mannich base dispersant/VI-improvers
    Patent number: 4963277
    Abstract: A method is described for improving the viscosity storage stability of a Mannich base condensation product of an oxidized polyolefin, formaldehyde, and an amine. This method involves contacting such Mannich base condensation product with a lower alkyl peroxide, a lower alkyl hydroperoxide or an aryl(lower)alkyl hydroperoxide at a temperature of about 250.degree. F. to about 400.degree. F. for a time period sufficient to provide an oxidized product.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: October 16, 1990
    Assignee: Amoco Corporation
    Inventors: David J. Fenoglio, Yoon S. Song, Robert J. Basalay
  • Mannich dispersant VI-improver blended with phenolic compound for improved storage stability
    Patent number: 4808325
    Abstract: Improved dispersant and VI-improving Mannich composition having reduced susceptibility to viscosity increase during storage, which composition comprises a physical blend prepared by admixing a phenolic compound with a Mannich condensation product obtained from the Mannich reaction of an oxidized polymer, an amine and a formaldehyde-yielding reagent.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: February 28, 1989
    Assignee: Amoco Corporation
    Inventors: Yoon S. Song, Robert J. Basalay
  • Process for preparation of Mannich reaction products from oxidized polymers
    Patent number: 4663392
    Abstract: A process for the preparation of oil-soluble Mannich condensation products wherein an amine is prereacted with a sulfonic acid or ammonium sulfonate, oleic acid, and an oxidized olefin polymer and the prereaction product is reacted with an aldehyde.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: May 5, 1987
    Assignee: Amoco Corporation
    Inventors: Yoon S. Song, Henry A. McCandless
  • Double reverse helix agitator
    Patent number: 4627735
    Abstract: The double reverse helix agitator with an internal conveying screw is used in a gas phase olefin polymerization reactor having at least one polymerization section and has helical flights defined by helical blades which are mounted to a shaft, which extend in opposite axial directions and which have approximately the same radius from the axis of rotation of the agitator. The shaft has a spiral screw thread thereon for conveying polymer particles axially by the agitator through a reactor vessel.
    Type: Grant
    Filed: February 7, 1985
    Date of Patent: December 9, 1986
    Assignee: Standard Oil Company (Indiana)
    Inventors: Philip M. Rose, Yoon S. Song