Patents by Inventor Heiner Hofer

Heiner Hofer 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).

  • 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