Patents by Inventor Katufumi Kuzira

Katufumi Kuzira 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 DL-serine and process for separation and purification of the same
    Patent number: 5030750
    Abstract: Disclosed is a process for preparing DL-serine, which comprises synthesizing DL-serine according to Strecker reaction with use of a cyan compound, ammonium chloride, ammonia and a reaction substrate comprising glycol aldehyde, wherein the Strecker reaction is carried out under the reaction conditions of:molar ratios of the starting materials of:glycol aldehyde/cyan compound: more than 1.0 and not more than 1.50ammonium chloride/glycol aldehyde: more than 1.0 and not more than 2.0ammonium/cyan compound: 1.0 to 7.0reaction temperature: 20.degree. to 80.degree. C.reaction time: 15 to 120 minutes,and the reaction product obained in hydrolyzed.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: July 9, 1991
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Katufumi Kuzira, Masaki Odagiri, Makoto Imanari, Takashi Yokoi