Patents by Inventor Larry L. Kirkby

Larry L. Kirkby 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).

  • Preparation of alkenyl aromatic monomer butadiene rubber and preparation of impact resistant resin therefrom
    Patent number: 4362849
    Abstract: Butadiene is partially polymerized anionically in the presence of styrene to form a styrene-butadiene rubber of low styrene content. The resultant living polymer is terminated, butadiene removed, and optionally the styrene polymerized with or without additional styrene to form impact resistant styrene polymer.
    Type: Grant
    Filed: November 19, 1980
    Date of Patent: December 7, 1982
    Assignee: The Dow Chemical Company
    Inventors: Lu H. Tung, Larry L. Kirkby, Charles E. Lyons
  • Preparation of alkenyl aromatic monomer butadiene rubber
    Patent number: 4311819
    Abstract: Butadiene is partially polymerized anionically in the presence of styrene to form a styrene-butadiene rubber of low styrene content. The resultant living polymer is terminated, butadiene removed, and optionally the styrene polymerized with or without additional styrene to form impact resistant styrene polymer.
    Type: Grant
    Filed: November 19, 1980
    Date of Patent: January 19, 1982
    Assignee: The Dow Chemical Company
    Inventors: Lu H. Tung, Larry L. Kirkby, Charles E. Lyons