Patents by Inventor Yoshiko Fukumoto

Yoshiko Fukumoto 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 for the partial hydrogenation of conjugated dienes
    Patent number: 4590319
    Abstract: A method for the partial hydrogenation of conjugated dienes, characterized in that a chain conjugated diene in which the conjugated two double bonds have different numbers of substituents, is hydrogenated at a temperature of not higher than 50.degree. C. in the presence of a catalyst composed essentially of (1) a cobalt compound, (2) an organophosphine compound and (3) an aluminum compound, to obtain a partially hydrogenated product wherein as between said conjugated two double bonds, the one having a greater number of substituents is selectively hydrogenated.
    Type: Grant
    Filed: February 26, 1985
    Date of Patent: May 20, 1986
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Naoshi Imaki, Yoshiko Fukumoto