Patents by Inventor Johan Victor Marie Winteraeken

Johan Victor Marie Winteraeken 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).

  • Continuous process for preparing acrylate based pigment preparations
    Patent number: 6103795
    Abstract: Process for preparing pigment preparations by mixing a colored composition with monomers and simultaneously polymerizing the monomers in an extruder at elevated temperatures, whereby the following steps are carried out:(A) introducing continuously into an extruder(a) from 40 to 90% by weight of a pigment,(b) from 60 to 10% by weight of at least a monomer, selected from the group consisting of an acrylate and a methacrylate, whereby the amounts of pigment and monomer sum up to 100%, and, if desired,(c) from 0 to 10% by weight, based on the amount of component (b), of an initiator, and(B) mixing the components (a), (b), and, if desired, (c) therein, and(C) withdrawing continuously the obtained reaction mixture from the extruder, and a high molecular organic material pigmented with the pigment preparation.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: August 15, 2000
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Johannes Leugs, Johan Victor Marie Winteraeken, Gerben Pieter Algra, Maria Gerardus Legnardus Delamboy, Adrianus Hendrikus Van Rooijen
  • Continuous process for preparing acrylate based pigment preparations
    Patent number: 5905111
    Abstract: Process for preparing pigment preparations by mixing a colored composition with monomers and simultaneously polymerizing the monomers in an extruder at elevated temperatures, whereby the following steps are carried out:(A) introducing continuously into an extruder(a) from 40 to 90% by weight of a pigment,(b) from 60 to 10% by weight of at least a monomer, selected from the group consisting of an acrylate and a methacrylate, whereby the amounts of pigment and monomer sum up to 100%, and, if desired,(c) from 0 to 10% by weight, based on the amount of component (b), of an initiator, and(B) mixing the components (a), (b), and, if desired, (c) therein, and(C) withdrawing continuously the obtained reaction mixture from the extruder, and a high molecular organic material pigmented with the pigment preparation.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: May 18, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Johannes Leugs, Johan Victor Marie Winteraeken, Gerben Pieter Algra, Maria Gerardus Legnardus Delamboy, Adrianus Hendrikus Van Rooijen