Patents by Inventor Johanna L. E. Kortenoeven-van den Beuken

Johanna L. E. Kortenoeven-van den Beuken 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 vinylpyrenes
    Patent number: 3991128
    Abstract: Vinylpyrene (substituted or not) is prepared in a single reaction stage by reacting the corresponding acetylpyrene with a metal alkoxide, e.g. aluminum isopropoxide, in an inert organic solvent, e.g. a xylene, at a temperature above 110.degree. C. which, for some reaction conditions, optimally is between 130.degree. and 150.degree. C. The presence of hydroquinone in the mixture reduces the time and increases the yield of the reaction.
    Type: Grant
    Filed: September 26, 1975
    Date of Patent: November 9, 1976
    Assignee: Oce-van der Grinten N.V.
    Inventors: Johanna L. E. Kortenoeven-van den Beuken, Gerardus J. Crommentuyn