Patents by Inventor Georg Hardenbicker

Georg Hardenbicker 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 4,5,6-trichloro-and 2,4,5,6-tetrachloropyrimidine
    Patent number: 6369259
    Abstract: Crystals with an average crystal size of ≦10 &mgr;m comprising compounds of the formula Ia and/or IIa A process for making said crystals.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: April 9, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Guido Steffan, Georg Hardenbicker
  • Method of preparing 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine
    Patent number: 6162917
    Abstract: The invention relates to a process for the preparation of 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine starting from 3-dimethylamino-propionitrile, to its use and also to a crystalline intermediate product form.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: December 19, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Guido Steffan, Georg Hardenbicker
  • Process for preparing nucleus-halogenated benzoyl chlorides
    Patent number: 5840975
    Abstract: Ring-halogenated benzoyl chlorides are obtained in a particularly advantageous manner if ring-halogenated benzotrichlorides are reacted with formic acid in the presence of iron salts.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: November 24, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhold Gehring, Herbert Muller, Georg Hardenbicker, Werner Bussmann