Patents by Inventor Yoshio Kabata

Yoshio Kabata 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 the polymerization of cyclic ether
    Patent number: 5907054
    Abstract: The present invention provides a process for the production of an ester of polyoxyalkylene glycol on an industrially favorable basis which comprises the ring opening polymerization of a cyclic ether in the presence of a carboxylic anhydride and a solid acid polymerization catalyst to obtain a polymer esterified at some or all of the ends thereof, wherein the water content in the reaction system is maintained at not more than 30 ppm by weight during the polymerization reaction.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: May 25, 1999
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tohru Setoyama, Yoshio Kabata, Mitsuharu Kobayashi
  • Method for producing a polyoxyalkylene glycol and novel metallo-aluminosilicate
    Patent number: 5648558
    Abstract: A method for producing a polyoxyalkylene glycol by ring opening polymerization of a cyclic ether, wherein a zeolite (other than ZSM-5, ZSM-11 and Nu-5) is used as a catalyst.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: July 15, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masakatsu Hatano, Akio Nakanishi, Yoshio Kabata, Masayuki Shirado, Hiroshi Takeo, Mitsuharu Kobayashi