Patents Assigned to Gebroeders Cappelle, N.V.
  • Bismuth-based pigments and process for their manufacture
    Patent number: 6464772
    Abstract: The present invention relates to very durable bismuth-based inorganic pigments with a light vivid yellow to orange color corresponding to the following general formula: BiV(1−n)XnO(4−3n) in which X is a halogen or a mixture of halogens and n can vary from 0 to 1. The invention also relates to the process for the manufacture of such pigments.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: October 15, 2002
    Assignee: Gebroeders Cappelle N.V.
    Inventors: Frank Vermoortele, Emile Joseph Buyse
  • Heat resistant bismuth vanadate pigment and process for its manufacture
    Patent number: 6458197
    Abstract: The present invention relates to a pigment based on bismuth vanadate with a bright vivid yellow to orange color exhibiting improved resistance, in particular an improved resistance to heat, characterized in that it is coated with several layers of inorganic compounds in several successive stages, the last layer being based on a zinc and boron compound. The present invention also relates to the process for producing this pigment and to its application.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: October 1, 2002
    Assignee: Gebroeders Cappelle, N.V.
    Inventors: Frank Vermoortele, Emile Joseph Buyse