Patents by Inventor Dieter Feinauer

Dieter Feinauer 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 white melamine-phenol-aldehyde resins which are resistant to yellowing
    Patent number: 4229557
    Abstract: Resins which are substantially white and resistant to yellowing are obtained by the addition of ammonium or alkali phosphates or ammonium or alkali borates during the production or processing of melamine-phenol-aldehyde resins in an aqueous basic medium, and by subsequently obtaining the resin by dehydration at a temperature of at least 70.degree. C.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: October 21, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Dieter Feinauer, Ludwig Streinz