Patents by Inventor Katufumi Kujira

Katufumi Kujira 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 pyruvate
    Patent number: 5225593
    Abstract: A process for preparing pyruvate in high yield is disclosed, comprising reacting propylene glycol with molecular oxygen in an aqueous solution in the presence of a platinum catalyst containing a metallic component selected from the group consisting of lead, thallium, and cadmium while controlling the pH of the reaction mixture between 7 and 9. The crude pyruvate can be purified by treating with activated carbon in the presence of water.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: July 6, 1993
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Makoto Imanari, Katufumi Kujira, Hiroshi Iwane
  • Process for preparing 2-(o-aminophenyl)ethanol
    Patent number: 4937382
    Abstract: A process for preparing 2-(o-aminophenyl)ethanol comprising reducing 2-(o-nitrophenyl)ethanol with hydrogen in the presence of a Raney nickel catalyst is described, in which said reducing is carried out in the presence of a small amount of an alkali compound. The Raney nickel catalyst exhibits improved activity to achieve an increased reaction rate.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: June 26, 1990
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Katufumi Kujira, Hiroshi Iwane, Makoto Imanari