Patents by Inventor Inge Krämer

Inge Krämer 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).

  • Copolymers containing aminoplast units and use thereof as a dispersing agent or stabilizers
    Patent number: 7335699
    Abstract: A description is given of water-soluble aminoplast ether copolymers of the following structural type: wherein Z is a glycoluril central unit, B is a radical of an essentially water-insoluble polymer and R1 is a radical of a hydrophilic organic compound. The ratio R1:B is selected within a range of about 1.5 to 4:1 and the overall mass of the water-soluble aminoplast ether copolymer is from about 2000 to 50 000 g/mol such that the copolymer is soluble in water and may be used as a dispersant for e.g. pigments in polar solvents, e.g. water.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: February 26, 2008
    Assignee: Sud-Chemie AG
    Inventors: Klaus Dziwok, Inge Krämer, Norbert Schall, Helmut Coutelle, Sabine Huth, Alan Steinmetz, Thadeus Schauer, Heinz Greisiger, Mark Entenmann
  • Use of amphiphilic polymers or copolymers for surface modification of reactive inorganic fillers
    Patent number: 6929860
    Abstract: Surface-modified fillers are described characterized by the fact that the fillers represent reactive inorganic fillers and the modifying agent represents an amphiphilic aminoplastic-ether polymer or copolymer of the structural type in which: Z denotes the same or different aminoplastic central units based on melamine-formaldehyde or urea-formaldehyde derivatives; n=10 to 500; R denotes the group —[O—CH2—CH2]mO—S in which m=5 to 500 and S represents a substituted or unsubstituted alkyl, aryl, alkaryl or aralkyl group.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: August 16, 2005
    Assignee: Sud-Chemie AG
    Inventors: Alan Lawrence Steinmetz, Norbert Schall, Klaus Dziwok, Helmut Coutelle, Wolfgang Simon, Stefan Dick, Inge Krämer, Hubert Schiessling