Patents by Inventor Taro Okumura

Taro Okumura 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 purification of isoprene
    Patent number: 4147848
    Abstract: A process for purifying a crude isoprene containing polymerization inhibiting materials such as acetylenes and sulfur compounds to produce high purity or polymerization grade isoprene comprising distilling the crude isoprene in the presence of at least one member selected from saturated hydrocarbons containing 6 to 8 carbon atoms, withdrawing the polymerization inhibiting materials as an overhead fraction and obtaining purified isoprene as a bottom fraction.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: April 3, 1979
    Assignee: Japan Synthetic Rubber Co. Ltd.
    Inventors: Masatoshi Arakawa, Haruo Yamanouchi, Taro Okumura, Teruo Yoshida
  • Process for preparing alkali metal dispersions
    Patent number: 4132666
    Abstract: A process for preparing alkali metal dispersions comprises continuously feeding a molten alkali metal, a dispersing agent, and an inactive dispersion liquid to a multipass emulsifier to form an emulsion of the molten alkali metal, and rapidly cooling the emulsion to a temperature at least 10.degree. C lower than the melting point of the alkali metal.
    Type: Grant
    Filed: July 27, 1977
    Date of Patent: January 2, 1979
    Assignee: Japan Synthetic Rubber Company, Limited
    Inventors: Tatsusuke Chikatsu, Shinichi Shimokawa, Takao Miura, Taro Okumura