Patents by Inventor Michael Butow

Michael Butow 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).

  • Anthraquinone dyestuffs for liquid crystal dielectrics
    Patent number: 4532069
    Abstract: New anthraquinone dyestuffs of the general formula I ##STR1## wherein Hal is a halogen atom and the two radicals R are each H or NH.sub.2 and the alkyl group has 1-8 C atoms, exhibit a high order parameter and are suitable for use as components of liquid-crystal dielectrics.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: July 30, 1985
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Gunter Scherowsky, Michael Butow