Patents by Inventor Toshiyasu Watanabe

Toshiyasu Watanabe 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 producing 3-pentenoic esters
    Patent number: 4332966
    Abstract: A process is disclosed for producing a 3-pentenoic ester which comprises reacting butadiene, carbon monoxide and an alcohol in the presence of cobalt carbonyl catalyst, characterized in that the reaction is carried out in a reaction medium composed of at least two solvents selected from the group consisting of pyridine, quinoline, isoquinoline and substituted pyridine, substituted quinoline and substituted isoquinoline in which substituent or substituents are selected from the group consisting of alkyl having 1-6 carbon atoms, alkenyl having 1-6 carbon atoms, aryl, alkylaryl having 7-10 carbon atoms and aralkyl having 7-10 carbon atoms.
    Type: Grant
    Filed: October 21, 1980
    Date of Patent: June 1, 1982
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Nobuo Isogai, Motoyuki Hosokawa, Takashi Okawa, Natuko Wakui, Toshiyasu Watanabe