Patents by Inventor Christian Zeh

Christian Zeh 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).

  • Publication number: 20110091804
    Abstract: The invention relates to a pigment preparation, comprising (a) pigmentary copper phthalocyanine of the beta phase, characterized by a mean particle size d50 of 40 to 80 nm and a mean length to width ratio of the pigment particles of less than or equal to 2.0:1, and (b) 1% to 30% by weight, relative to the weight of the pigmentary copper phthalocyanine, of a pigment dispersant of the formula (II) where CPC is a group of a copper phthalocyanine, n is a number from 1 to 4.0, m is a number from 0.5 to 4.0; Kat is a cation from the group of the alkali metals, or H+; o is a number from 0 to 3.5, with n=m+o; R1, R2, R3, R4 are the same or different and are C1-C20 alkyl, C2-C20 alkenyl, C5-C20 cycloalkyl, C5-C20 cycloalkenyl or C1-C4 alkyl-phenyl, wherein the above groups are optionally substituted by hydroxyl and/or halogen. The pigment preparation is characterized by extreme high viscosity stability, which makes it particularly suitable for aqueous, solvent based and UV-curing inkjet inks.
    Type: Application
    Filed: May 2, 2009
    Publication date: April 21, 2011
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Josef Geisenberger, Hans-Tobias Macholdt, Thomas Metz, Steffen Schneider, Christian Zeh