Patents by Inventor Susumu Hamanishi

Susumu Hamanishi 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 producing high purity benzene
    Patent number: 4247729
    Abstract: A liquid product obtained by hydrodealkylation of hydrocarbon oil containing aromatic hydrocarbons is firstly subjected to rectification, then thus obtained substantially pure benzene is treated with clay substance under a temperature below 120.degree. C. A highly purified benzene especially good in color is obtained.
    Type: Grant
    Filed: April 5, 1979
    Date of Patent: January 27, 1981
    Assignee: Mitsubishi Petrochemical Company, Limited
    Inventors: Hideyuki Takahashi, Yoshiyuki Matsuoka, Susumu Hamanishi