Patents by Inventor Klaus D. Berg

Klaus D. Berg 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).

  • Process for the purification of bisphenols
    Patent number: 5269887
    Abstract: A process for the purification of bisphenols by distillation.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: December 14, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Jakob, Manfred Schmidt, Dieter Freitag, Klaus D. Berg
  • Process for the preparation of substituted cycloalkylidene bisphenols
    Patent number: 5210328
    Abstract: This invention relates to a process for the preparation of substituted cycloalkylidene bisphenols from phenols and special cycloalkanones in the presence of acid condensation catalysts and in the presence of water.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: May 11, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Freitag, Claus H. Wulff, Alfred Eitel, Helmut Waldmann, Uwe Westeppe, Manfred Hajek, Klaus D. Berg, Bernd Griehsel, Carl Casser
  • Fluorinated alkylamidosulphonates, their preparation, their use as flame retardants, and polycarbonate moulding compositions containing them
    Patent number: 4826634
    Abstract: Fluorinated alkylamidosulphonates of the formula ##STR1## in which R.sup.1 represents hydrogen, alkyl or fluorinated alkyl,R.sub.F represents fluorinated alkyl andM.sup..sym. represents an equivalent of a cation,a process for their preparation from the corresponding fluorinated alkylamidosulphonyl chlorides, their use as flame retardants for polycarbonate moulding compositions, and polycarbonate moulding compositions containing them.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: May 2, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Baasner, Klaus D. Berg, Ulrich Grigo