Patents by Inventor Werner Kuendig

Werner Kuendig 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 of preparing 4-methyl-5-hydroxymethyl-imidazole
    Patent number: 4189591
    Abstract: The yield of 4-methyl-5-hydroxymethyl-imidazole from the known reaction between formaldehyde and 4-methyl-imidazole can be increased greatly if the reaction is performed in a concentrated aqueous medium at pH 11-13.5, preferably 12-13.5, at a temperature of 20.degree.-60.degree. C., preferably 30.degree.-40.degree. C., with an amount of formaldehyde not exceeding 1.5 mole per mole of 4-methyl-imidazole.
    Type: Grant
    Filed: January 25, 1979
    Date of Patent: February 19, 1980
    Assignee: Eprova Aktiengesellschaft
    Inventors: Hans-Rudolf Mueller, Werner Kuendig, Alfred Hedinger