Patents Represented by Attorney Diderico van Eyt
  • Patent number: 6936739
    Abstract: This invention relates to 1,2-di(4-hydroxyaryl)tetrafluoroethanes of the general formula (I) wherein R are each, independently of one another, hydrogen, F, Cl, Br, I, CN, COOR2, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, C1-C4-perfluoroalkyl, C1-C4-perfluoroalkoxy, C1-C4-perfluoroalkylthio, C1-C4-polyfluoroalkyl, C1-C4-polyfluoroalkoxy, or C1-C4-polyfluoroalkylthio, R2 is C1-C4-alkyl, and n is an integer from 0 to 4. This invention further relates to the preparation of such compounds as well as to precursors and intermediates that can be used in their preparation.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: August 30, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albrecht Marhold, Käthe Baumann