Patents by Inventor Christiane Griessen

Christiane Griessen 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).

  • Patent number: 6645257
    Abstract: A process for pigmenting wood, which comprises treating wood in succession: a) with a solution comprising from 0.01 to 80% by weight, based on the solution, of a compound of the formula A(B)x  (I), in which x is an integer from 1 to 8, A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, indanthrone, isoindolinone, isoindoline, dioxazine, azo, phthalocyanine or diketopyrrolopyrrole series which is attached to x groups B via one or more heteroatoms, these heteroatoms being selected from the group consisting of N, O and S and forming part of the radical A, B is hydrogen or a group of the formula  at least one group B not being hydrogen and, if x is a number from 2 to 8, the groups B being identical or different, and L is any desired group suitable for solubilization; and from 0.05 to 5% by weight, based on the solution, of a salt of the formula Kat+.An−  (II), Kat+.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: November 11, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Hans-Thomas Schacht, Gilbert Moegle, Reiner Jahn, Christiane Griessen, Peter Scheibli