Patents by Inventor Karl Hetterich

Karl Hetterich 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).

  • Amphoteric polymer dispersion
    Patent number: 6255427
    Abstract: An amphoteric polymer dispersion obtained in the presence of at least one of starch or a starch derivative by a two-stage polymerization using anionic and cationic monomers is useful as a sizing agent for paper products, as a coating for various substrates, and as a binder in pigment-free coatings or pigment-containing coatings. The dispersion is exceptionally compatible with widely differing sizing agent systems and coating chemicals.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: July 3, 2001
    Assignee: Giulini Chemie GmbH
    Inventors: Reiner Exner, Hasen Ulubay, Karl Hetterich
  • Amphoteric and anionic polymer dispersions, process for their preparation and use thereof
    Patent number: 5925722
    Abstract: A process for producing an amphoteric aqueous polymer dispersion by two-step radical copolymerization includes (a) decomposing a starch by treatment with an enzyme or acid hydrolysis to provide a starch solution composed of decomposed starch and/or derivatives thereof having an average molecular weight ranging from 500 to 2000 g/mole and with the starch solution having an internal viscosity<0.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: July 20, 1999
    Assignee: Giulini Chemie GmbH
    Inventors: Reiner Exner, Hasan Ulubay, Karl Hetterich