Patents by Inventor Karl-Heinz Derwenskus

Karl-Heinz Derwenskus 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: 7015281
    Abstract: The invention concerns alkali-stable hydrophilic sorbents for ion-exchange chromatography. The invention is characterized in that it consists in using as base material a crosslinked vinyl polymerconsisting of vinyl monomers containing diol groups and crosslinking monomers whereof the polymerizable groups are bound by carbonamide-containing chains. Monomers containing ionic groups are grafted on said base material using cerium (IV) salts.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: March 21, 2006
    Assignee: Merck Patent GmbH
    Inventors: Lothar Britsch, Karl-Heinz Derwenskus
  • Publication number: 20050006240
    Abstract: The present invention provides a field generating membrane electrode for contact with an electrolyte solution comprising a wetable membrane which is ion permeable under electric field conditions and an electrically conductive material for connection with a source of electrical charges, characterized in that one side of the membrane is in direct contact with the electrolyte solution and the other side of the membrane is in direct contact with the electrically conductive material and a gas receiving volume. The electrode according to the present invention is especially useful for electrokinetic transport, electrokinetic pumping, electrophoretic transport, isotachophoretic transport, separation of ions or electrochemical reaction of ions.
    Type: Application
    Filed: October 30, 2002
    Publication date: January 13, 2005
    Inventors: Renate Bender, Thomas Greve, Karl-Heinz Derwenskus, Matthias Johnck, Sigrid Sturmfels, Bernd Stanislawski, Dusan Kaniansky, Marian Masar, Robert Bodor
  • Publication number: 20040266896
    Abstract: The invention concerns alkali-stable hydrophilic sorbents for ion-exchange chromatography. The invention is characterized in that it consists in using as base material a crosslinked vinyl polymerconsisting of vinyl monomers containing diol groups e and crosslinking monomers whereof the polymerizable groups are bound by carbonamide-containing chains. Monomers containing ionic groups are grafted on said base material using cerium (IV) salts.
    Type: Application
    Filed: April 2, 2004
    Publication date: December 30, 2004
    Inventors: Lothar Britsch, Karl-Heinz Derwenskus
  • Patent number: 6710198
    Abstract: Described are bis(perfluoro-n-alkane-sulfonate) compounds, methods for preparing these compounds and use of these compounds, for example as starting materials for the synthesis of chiral and phosphine ligands for transition metal catalysts.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: March 23, 2004
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Andreas Wachtler, Karl-Heinz Derwenskus, Andreas Meudt
  • Publication number: 20030191335
    Abstract: Described are bis(perfluoro-n-alkane-sulfonate) compounds, methods for preparing these compounds and use of these compounds, for example as starting materials for the synthesis of chiral and phosphine ligands for transition metal catalysts.
    Type: Application
    Filed: August 9, 2001
    Publication date: October 9, 2003
    Applicant: Merck Patent GmbH
    Inventors: Andreas Wachtler, Karl-Heinz Derwenskus, Andreas Meudt
  • Publication number: 20030021730
    Abstract: The invention relates capillaries which are filled with or which can be filled with particulate sorbents. Said capillaries are sealed with a frit on at least one end. The frit is made of a monolithic inorganic or organic material which is directly polymerized into the capillary or which is introduced into the first capillary in the form of a second capillary filled with monolithic material.
    Type: Application
    Filed: August 2, 2002
    Publication date: January 30, 2003
    Inventors: Egbert Mller, Dieter Lubda, Karl-Heinz Derwenskus, Hans-Dieter Harders
  • Patent number: 6353125
    Abstract: Described are bis(perfluoro-n-alkane-sulfonate) compounds, methods for preparing these compounds and use of these compounds, for example as starting materials for the synthesis of chiral and phosphine ligands for transition metal catalysts.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: March 5, 2002
    Assignee: Merck Patent GmbH
    Inventors: Andreas Wächtler, Karl-Heinz Derwenskus, Andreas Meudt