Patents by Inventor Kazutaka Morino

Kazutaka Morino 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 preparing 2,4-dichloro-3-alkyl-6-nitrophenols
    Patent number: 5136109
    Abstract: 2-4-Dichloro-3-alkyl-6-nitrophenols which are useful as intermediate of cyan couplers in color photography are prepared by sulfonating 4-chloro-3-alkyl-phenols to obtain 5-chloro-4-alkylhydroxybenzenesulfonic acids, chlorinating the acids in an aqueous phase to obtain 3,5-dichloro-4-alkyl-2-hydroxybenzenesulfonic acids and nitrating the sulfonic acids.
    Type: Grant
    Filed: May 29, 1991
    Date of Patent: August 4, 1992
    Assignee: Taoka Chemical Company, Ltd.
    Inventors: Osamu Kimura, Yasuhiko Horikawa, Masaya Yamashita, Kazutaka Morino, Shinichi Koyama