Patents by Inventor Sumio Umumura

Sumio Umumura 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 preparation of 3-alkoxy-4-hydroxyphenylacetic acid
    Patent number: 4401830
    Abstract: 3-Alkoxy-4-hydroxyphenylacetic acid useful as intermediate for preparation of pharmaceuticals is prepared by catalytic reduction with hydrogen using a palladium catalyst of corresponding 3-alkoxy-4-hydroxymandelic acid occurring as the reaction product between 2-alkoxyphenol and glyoxylic acid at high conversion and yield.
    Type: Grant
    Filed: January 2, 1981
    Date of Patent: August 30, 1983
    Assignee: UBE Industries, Ltd.
    Inventors: Sumio Umumura, Fumio Iwata, Kikuo Ataka, Hiroshi Shiraishi