Patents by Inventor Norbert Bachem

Norbert Bachem 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).

  • Ion exchangers modified with mercapto amines
    Patent number: 5284981
    Abstract: This invention relates to a catalyst modified with mercapto amines, its preparation and its use for the preparation of bisphenols.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: February 8, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Udo Rudolph, Norbert Bachem, Claus Wulff
  • Ion exchange modified with mercapto amines
    Patent number: 5212206
    Abstract: This invention relates to a catalyst modified with mercapto amines, its preparation and its use for the preparation of bisphenols.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: May 18, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Udo Rudolph, Norbert Bachem, Claus Wulff
  • Ionic exchangers modified with thiazolines
    Patent number: 4912263
    Abstract: This invention relates to an ionic exchanger modified with thiazolines, to its preparation and to its use for the preparation of condensation products, particularly bisphenols.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: March 27, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Udo Rudolph, Claus Wulff, Jurgen Hinz, Norbert Bachem
  • Catalyst for the preparation of bisphenols
    Patent number: 4369293
    Abstract: A catalyst for the preparation of bisphenols from phenols and compounds containing carbonyl groups consisting of a styrene/divinyl benzene copolymer into which are introduced sulphochloride groups which, in turn, have been partly reacted with mercaptoalkylamine and partly hydrolyzed to form sulphonic acid groups.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: January 18, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Frieder Heydenreich, Claus Wulff, Lothar Klein, Hans-Jurgen Meissner, Norbert Bachem