Patents by Inventor Erich A. E. Linke

Erich A. E. Linke 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).

  • Doped zirconium mixed silicate pigment, method for the preparation thereof and products containing such pigment or a thus prepared pigment
    Patent number: 5275649
    Abstract: A new doped zirconium mixed silicate pigment has been found, having a particle size D.sub.50 of 3 .mu.m or less and a molar ratio of zirconium dioxide/silicon dioxide that deviates from the stoichiometric ratio and is in the range of 1/1.5-1/36. This new pigment is doped with 1-25% by weight of a color-providing metal oxide an exhibits great color strength as well as good thermostability. The new pigment, which has a very high particle fineness, can be used for ceramic applications and for coloring glass, but is also particularly suitable for applications outside the ceramic field, in particular as a colorant in plastics, rubber, paint, printing ink and cosmetic products. Further, a similar new doped zirconium silicate pigment has been found, which, however, has a D.sub.50 particle size that is greater than 3 .mu.m, the molar ratio of zirconium dioxide/silicon dioxide being in the range of 1/4.9-1/36. The last-mentioned pigment is very suitable to be incorporated into glass.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: January 4, 1994
    Assignee: ColoRSil B.V.
    Inventors: Erich A. E. Linke, Cornelis H. Zwart, Adrianus D. Smout