Patents by Inventor Lothar Wihan

Lothar Wihan 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).

  • Water-based pigment dispersions, the production thereof and the use of the same
    Patent number: 7135067
    Abstract: The invention relates to a pigment dispersion consisting essentially of a) at least one organic or inorganic pigment or a combination of the same, b) an alpha-methyl--omega-hydroxy-polyethylene glycol ether having an average molar mass of between 250 and 1000 g/mol, c) standard dispersing agents for producing aqueous pigment dispersions, d) water, and e) optionally other standard additives.
    Type: Grant
    Filed: June 29, 2002
    Date of Patent: November 14, 2006
    Assignee: Clariant GmbH
    Inventors: Andreas Harz, Lothar Wihan, Martin Alexander Winter, Andreas Pfrengle
  • Water-based pigment dispersions, the production thereof and the use of the same
    Publication number: 20050075415
    Abstract: The invention relates to a pigment dispersion consisting essentially of a) at least one organic or inorganic pigment or a combination of the same, b) an alpha-methyl-omega-hydroxy-polyethylene glycol ether having an average molar mass of between 250 and 1000 g/mol, c) standard dispersing agents for producing aqueous pigment dispersions, d) water, and e) optionally other standard additives.
    Type: Application
    Filed: June 29, 2002
    Publication date: April 7, 2005
    Inventors: Andreas Harz, Lothar Wihan, Martin Winter, Andreas Pfrengle