Patents by Inventor Robert S. Nygren

Robert S. Nygren 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 the production of guaiacol glycerine ether
    Patent number: 4390732
    Abstract: Guaiacol glycerine ether is obtained in very good yield and in very high purity by reacting glycidol with o-methyoxyphenol in the presence of an alkali hydroxide, an alkali alcoholate, an alkali cyanate or an alkali thiocyanate at 80.degree. to 150.degree. C. An especially effective purification of the crude product can be obtained by adding hydrogen peroxide, preferably prior to cooling.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: June 28, 1983
    Assignee: Degussa AG
    Inventors: Wolfgang Merk, Rudolf M. Wagner, Peter Werle, Robert S. Nygren