Patents by Inventor Christiane Strohm-Zimmermann

Christiane Strohm-Zimmermann 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).

  • Diketopyrrolopyrrole pigments having heightened fastnesses and processes for preparing them
    Patent number: 7695558
    Abstract: The invention relates to a diketopyrrolopyrrole pigment of formula (I) in which R10, R11, R12 and R13 independently of one another denote hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, cyano or phenyl, characterized by a first maximum of the frequency distribution (according to weight fractions) of the crystal sizes at or below 700 nm and at least one further maximum of the frequency distribution (according to weight fractions) of the crystal sizes which is at least 100 nm above the first maximum.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: April 13, 2010
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Matthias Ganschow, Christiane Strohm-Zimmermann
  • Diketopyrrolopyrrole Pigments Having Heightened Fastnesses and Processes for Preparing Them
    Publication number: 20090084286
    Abstract: The invention relates to a diketopyrrolopyrrole pigment of formula (I) in which R10, R11, R12 and R13 independently of one another denote hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, cyano or phenyl, characterized by a first maximum of the frequency distribution (according to weight fractions) of the crystal sizes at or below 700 nm and at least one further maximum of the frequency distribution (according to weight fractions) of the crystal sizes which is at least 100 nm above the first maximum.
    Type: Application
    Filed: January 17, 2007
    Publication date: April 2, 2009
    Inventors: Matthias Ganschow, Christiane Strohm-Zimmermann