Patents by Inventor Mitsuyuki Mitooka

Mitsuyuki Mitooka 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).

  • Method of producing activated carbons from petroleum heavy materials in a reaction solvent with a sulfonating agent
    Patent number: 3940344
    Abstract: A method of producing granular or lumpy hard raw materials for activated carbon with a high yield by reacting a petroleum heavy material, such as a petroleum heavy oil or heavy residue, with a sulfonating agent in a reaction solvent thereby converting the petroleum heavy material into a carbonized material.
    Type: Grant
    Filed: September 13, 1973
    Date of Patent: February 24, 1976
    Assignee: Maruzen Oil Co., Ltd.
    Inventors: Akira Yokogawa, Mitsuyuki Mitooka, Kenji Shima