Patents by Inventor Jean-Claude Wilhelm

Jean-Claude Wilhelm 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).

  • Phthalimidyl azo dyes, process for the preparation thereof and the use thereof
    Patent number: 7087731
    Abstract: The present invention relates to dyes of formula wherein R1 is hydrogen, methyl or —BHCO—C1–C4alkyl, R2 is C1–C4alkyl, it being possible for the alkyl chain, from C2 upwards, optionally to be interrupted by an oxygen atom, and R3 has, independent of R2, any of the meanings of R2, and to the process for the preparation thereof and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydmophobic fiber materials, especially textile materials.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: August 8, 2006
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Antoine Clément, Jean-Claud Wilhelm, Alfons Arquint, Urs Lauk
  • Phthalimidyl azo dyes, process for the preparation thereof and the use thereof
    Patent number: 7012137
    Abstract: The present invention relates to dyes of formula (I) wherein R is hydrogen or bromine, R1 is hydrogen, methyl or —NHCO—C1–C4alkyl, R2 is C1–C4alkyl substituted by C1–C4alkoxy and R3 has, independently of R2, any of the meanings of R2, and to the process for the preparation thereof and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydrophobic fiber materials, especially textile materials.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: March 14, 2006
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Antoine Clément, Jean-Claude Wilhelm, Alfons Arquint, Urs Lauk
  • Phthalimidyl azo dyes, process for the preparation thereof and the use thereof
    Publication number: 20040116681
    Abstract: The present invention relates to dyes of formula (I) wherein R is hydrogen or bromine, R1 is hydrogen, methyl or —NHCO—C1-C4alkyl, R2 is C1-C4alkyl substituted by C1-C4alkoxy and R1 has, independently of R2, any of the meanings of R2, and to the process for the preparation thereof and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydrophobic fibre materials, especially textile materials.
    Type: Application
    Filed: August 4, 2003
    Publication date: June 17, 2004
    Inventors: Antoine Clement, Jean-Claude Wilhelm, Alfons Arquint, Urs Lauk
  • Phthalimidyl azo dyes, process for the preparation thereof and the use thereof
    Publication number: 20040097716
    Abstract: The present invention relates to dyes of formula wherein R1 is hydrogen, methyl or —BHCO—C1-C4alkyl, R2 is C1-C4alkyl, it being possible for the alkyl chain, from C2 upwards, optionally to be interrupted by an oxygen atom, and R3 has, independent of R2, any of the meanings of R2, and to the process for the preparation thereof and to the use thereof in dyeing or prnig semi-synthetic and especially synthetic hydmophobic tibre materials, especially textile materials.
    Type: Application
    Filed: August 4, 2003
    Publication date: May 20, 2004
    Inventors: Antoine Clement, Jean-Claude Wilhelm, Alfons Arquint, Urs Lauk
  • Azo dyes, a process for their preparation and their use in the dyeing or printing of hydrophobic fiber materials
    Patent number: 6540794
    Abstract: The present invention relates to dyes of formula wherein R1 is hydrogen, bromine, chlorine, cyano, R2 is hydrogen, methyl, acetylamino, R3 is ethyl unsubstituted or substituted by cyano or by acyloxy, R4 is ethyl unsubstituted or substituted by cyano or by acyloxy, to a process for their preparation and to their use in the dyeing or printing of hydrophobic fiber materials.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: April 1, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Romeo Dreier, Jean-Claude Wilhelm, Alfons Arquint, Urs Lauk