Patents by Inventor Sehyun Kim

Sehyun Kim 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).

  • Metallocene catalyst and catalyst system for polymerizing an olefin having at least 3 carbon atoms
    Patent number: 6143683
    Abstract: A polyolefin metallocene catalyst which includes two metallocene components, a stereorigid isospecific metallocene catalyst component and a stereorigid syndiospecific metallocene catalyst component, both of which are supported upon the same support. A method of forming a catalyst system includes contacting the above catalyst with a cocatalyst or Lewis acid. A method of polymerization includes contacting an olefin of at least 3 carbon atoms with the catalyst system.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: November 7, 2000
    Assignee: Fina Technology, Inc.
    Inventors: Edwar S. Shamshoum, Margarito Lopez, Ted G. Harris, III, Sehyun Kim
  • Method of improving crystallization rate and temperature of syndiotactic polypropylene and compositions and products made therefrom
    Patent number: 5969021
    Abstract: Method of improving the crystallization rate and temperature of syndiotactic polypropylene by addition of at least one of polytetrafluoroethylene, sodium 2,2-methylene-bis-(4,6,di-tert-butylphenyl)phosphate)), pimellic acid, and calcium pimallate, and compositions and products made thereby.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: October 19, 1999
    Assignee: Fina Technology, Inc.
    Inventors: Baireddy Raghava Reddy, Sehyun Kim, Edwar S. Shamshoum