Patents by Inventor David Ruhdorfer

David Ruhdorfer 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).

  • PROCESS FOR THE PREPARATION OF FRAGMENTED NATURAL CALCIUM CARBONATE WITH A REDUCED CONTENT OF IMPURITIES AND PRODUCTS OBTAINED THEREOF
    Publication number: 20190389736
    Abstract: The present invention concerns a process for the preparation of fragmented natural calcium carbonate with a reduced content of impurities by use of a high voltage 5 fragmentation apparatus, as well as products obtained thereof and their use. Furthermore, the present invention refers to the use of a high voltage fragmentation apparatus and a separation step for reducing impurities in at least one natural calcium carbonate and impurities containing material.
    Type: Application
    Filed: December 20, 2017
    Publication date: December 26, 2019
    Inventors: Bahman Tavakkoli, David Ruhdorfer