Patents by Inventor Micahel Prein

Micahel Prein 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).

  • Bisphenol phenol adducts
    Publication number: 20030038094
    Abstract: The application relates to a process for producing high-purity bis(4-hydroxyaryl)alkanes from adducts of bis(4-hydroxyaryl)alkanes and aromatic hydroxy compounds, which are obtained by acid-catalysed reaction of the aromatic hydroxy compounds with ketones.
    Type: Application
    Filed: September 5, 2002
    Publication date: February 27, 2003
    Inventors: Rainer Neumann, Rolf Lanze, Frieder Heydenreich, Michael Bodiger, Micahel Prein