Patents by Inventor Uwe Halder

Uwe Halder 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).

  • Dye preparations
    Patent number: 6117224
    Abstract: Dye compositions useful as inks for the inkjet and sublimation transfer printing processes comprise, based on the weight of the composition, from 0.1 to 30 wt % of one or more dyes selected from the class of the anthraquinones or quinophthalones which are free from ionic groups, from 0.1 to 20 wt % of a dispersant based on an arylsulfonic acid-formaldehyde condensation product and, optionally, water.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: September 12, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Siegel, Uwe Halder, Manfred Herrmann, Herbert Leiter