Patents by Inventor Carolin Sansonnens

Carolin Sansonnens 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).

  • Single-phase mixed crystals of laked monoazo dyes
    Patent number: 6913640
    Abstract: Novel improved single-phase mixed crystals of monoazo dyes laked with alkaline earth metal cations and ammonium cations in a molar ratio of about 1:2 having a fine particle size and substantially better fastness properties than similar known products are excellently suitable as tinctorially strong pigments. Also claimed is a process for the preparation of a single-phase mixed crystal pigment of formula wherein E is Mg, Ca or Sr, by crystallisation from an inert hydrophilic liquid in the presence of solvated catiens E++, NR5R6R7R8+, x is a number from 0.33 to 0.62 and y is a number from 0.76 to 1.34, and the concentration of solvated catiens E++ at the beginning of the crystallisation is higher than the concentration of solvated cations NR5R8R7R8+.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: July 5, 2005
    Assignee: CIBA Specialty Chemicals
    Inventors: Philippe Bugnon, Carolin Sansonnens, Greig Chisholm