Patents by Inventor Mitsumasa Kitai

Mitsumasa Kitai 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).

  • ALIPHATIC TRIISOCYANATE COMPOUND, PROCESS FOR PRODUCING THE SAME, AND POLYURETHANE RESIN MADE FROM THE COMPOUND
    Publication number: 20020123644
    Abstract: 3-isocyanate methyl-1,6-hexamethylene diisocyanate which is useful for the production of polyurethane resins such as polyurethane polyisocyanate; a process for producing 3-isocyanate methyl-1,6-hexamethylene diisocyanate which process comprises reacting 3-aminomethyl-1,6-hexamethylene diamine with phosgene in the presence of a tertiary amine; and a paint or an adhesive containing the polyurethane resin produced using the above isocyanate compound.
    Type: Application
    Filed: October 12, 1999
    Publication date: September 5, 2002
    Inventors: MITSUMASA KITAI, HIROTAKA RYUUTOU, TOSHIHIKO YAHATA, YOSHINORI HARA, HIROSHI IWANE, YUUJI SOEJIMA
  • Method for producing (R)-4-cyano-3-hydroxybutyric acid lower alkyl ester
    Patent number: 5908953
    Abstract: Crude (R)-4-cyano-3-hydroxybutyric acid lower alkyl ester, obtained by subjecting an (S)-4-halogeno-3-hydroxybutyric acid lower alkyl ester to a cyano-introducing reaction, is purified by distillation carried out in the presence of a solvent having a boiling point within the range of 50.degree. C. to 160.degree. C. at 10 Torr.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: June 1, 1999
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hitoshi Matsuda, Toshiharu Shibata, Hidekichi Hashimoto, Mitsumasa Kitai
  • Method for dimerization of aromatic halide compounds
    Patent number: 4900843
    Abstract: A method of dehalogeno-dimerizing an aromatic halide compound substituted by at least one halogen atom substituted on the aromatic ring using a palladium catalyst on support in the presence of water, a reducing agent and a halogen acceptor is disclosed. The method is characterized by using the palladium catalyst on support immersed in a hydrohalogenic acid prior to the dehalogeno-dimerization reaction.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: February 13, 1990
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Mitsumasa Kitai, Yoshio Katsuro, Shigenori Kawamura, Masumi Hino, Keiichi Sato