Patents by Inventor Normann Kaniss

Normann Kaniss 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 production of 4-hydroxyphenylacetic acid
    Patent number: 4329497
    Abstract: Method for producing 4-hydroxyphenylacetic acid where(a) o-chlorophenol is reacted with glyoxylic acid to form 3-chloro-4-hydroxymandelic acid,(b) the 3-chloro-4-hydroxymandelic acid is reduced to 3-chloro-4-hydroxyphenylacetic acid, and(c) the chloro group is cleaved from the 3-chloro-4-hydroxyphenylacetic acid.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: May 11, 1982
    Assignee: Diamalt Aktiengesellschaft
    Inventors: Normann Kaniss, Adolf Bauer