Patents by Inventor Hanspeter Gethoeffer

Hanspeter Gethoeffer 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 for producing bisbenzoxazoles
    Patent number: 8067612
    Abstract: The invention relates to a method for producing bisbenzoxazoles that are interconnected by means of a system of conjugated double bonds, according to which o-aminophenols are reacted with dicarboxylic acids, the carboxyl groups of which are interconnected via a double bond or a system of conjugated double bonds, to form an ammonium salt, said ammonium salt being converted in the presence of dehydrogenating catalysts and solvents with a low dielectric loss into benzoxazol by means of microwave radiation.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: November 29, 2011
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Matthias Krull, Alexander Lerch, Roman Morschhaeuser, Norbert Beye, Hanspeter Gethoeffer, Helmut Ritter, Sarah Schmitz