Patents by Inventor Kurt Wegewitz

Kurt Wegewitz 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).

  • Patent number: 6624206
    Abstract: The invention relates to processes for the preparation of free-flowing end products of strongly acidic cation exchangers. In the case of the strongly acidic cation exchangers prepared by the processes described in Patent Application P 195 48 012.0, the particle beds of the end products are not free-flowing. By additions of wetting agents or water-soluble initiators or surfactants in the polymerization stage or after the filtration of the end product and/or process engineering means, a permanent or temporary free flowability of the particle beds of the strongly acidic cation exchangers is achieved using the following processes. 1. By additions of known wetting agents in amounts of 0.25 g/l of aqueous phase or water-soluble initiators in amounts of 0.05 to 20 g/l of aqueous phase to the copolymerization system 20 minutes to 120 minutes after reaching the gel point. 2. By treatment of the strongly acidic cation exchangers with aqueous solutions of surface-active substances having a content of 0.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: September 23, 2003
    Assignee: IAB Ionenaustauscher GmbH Bitterfeld
    Inventors: Reinhard Bachmann, Lothar Feistel, RĂ¼diger Seidel, Karl-Heinz Siekiera, Kurt Wegewitz
  • Publication number: 20020072546
    Abstract: The invention relates to processes for the preparation of free-flowing end products of strongly acidic cation exchangers. In the case of the strongly acidic cation exchangers prepared by the processes described in Patent Application P 195 48 012.0, the particle beds of the end products are not free-flowing.
    Type: Application
    Filed: February 11, 2002
    Publication date: June 13, 2002
    Inventors: Reinhard Bachmann, Lothar Feistel, Rudiger Seidel, Karl-Heinz Siekiera, Kurt Wegewitz
  • Patent number: 6384092
    Abstract: Sulfonated strongly acidic cation exchangers are rendered free-flowing by treatment with wetting agents or water soluble initiators, washing with water at temperatures of at least 60° C. and heat drying.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: May 7, 2002
    Assignee: IAB Ionenaustauscher GmbH Bitterfeld
    Inventors: Reinhard Bachmann, Lothar Feistel, RĂ¼diger Seidel, Karl-Heinz Siekiera, Kurt Wegewitz
  • Publication number: 20010051664
    Abstract: The invention relates to processes for the preparation of free-flowing end products of strongly acidic cation exchangers. In the case of the strongly acidic cation exchangers prepared by the processes described in Patent Application P 195 48 012.0, the particle beds of the end products are not free-flowing.
    Type: Application
    Filed: January 10, 2001
    Publication date: December 13, 2001
    Inventors: Reinhard Bachmann, Lothar Feistel, Rudiger Seidel, Karl-Heinz Siekiera, Kurt Wegewitz