Patents by Inventor Ronald Voorhaar

Ronald Voorhaar 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 9beta, 10alpha-5,7-diene steroids
    Patent number: 5304291
    Abstract: The invention relates to a method of preparing a 9beta,10alpha-5,7-diene steroid by irradiating the corresponding 9alpha,10beta-5,7-diene steroid with filtered ultraviolet light from an indium lamp.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: April 19, 1994
    Assignee: Duphar International Research B.V.
    Inventors: Berthus Bout, Ronald Voorhaar