Patents Examined by Thompson, Willie J.
  • Carbonate-containing mineral fillers, pigments and similar materials
    Patent number: 4767464
    Abstract: Carbonate-containing mineral fillers, pigments and similar materials are disclosed which are characterized by a combination of four features. These carbonate-containing materials can be used in particular in dyes, paints, paper pulps, paper coatings and plastics to great advantage. In addition, a method of preparing these carbonate-containing materials is disclosed.
    Type: Grant
    Filed: May 6, 1987
    Date of Patent: August 30, 1988
    Assignee: Pluss-Staufer AG
    Inventors: Dieter Strauch, Peter Belger, Heiner Hofer, Martin Merz