Patents by Inventor Erwin Warmerdam

Erwin Warmerdam 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).

  • Synthesis of estetrol via estrone derived steroids
    Publication number: 20060211669
    Abstract: A process is provided for the making of estetrol starting from a 3-A-oxy-estra 1,3,5(10),15-tetraen-17-one, wherein A is a C1-C5 alkyl group, preferably a methyl group, or a C7-C12 benzylic group, preferably a benzyl group. This process is particularly suitable to industry.
    Type: Application
    Filed: November 7, 2003
    Publication date: September 21, 2006
    Inventors: Mark Verhaar, Thomas Koch, Erwin Warmerdam