Patents by Inventor Tony Grondin

Tony Grondin 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).

  • Beneficiation of flake graphite
    Patent number: 5518189
    Abstract: This invention concerns a method of beneficiating graphite to a higher purity level by dislodging the impurities from graphite by attrition preferably in an attrition cell which has at least one set of opposing pitched impellers. A pulp is formed preferably essentially consisting of a flake graphite:attrition adjuvant:water in a ratio of 1:2:0.8 to 10 and this pulp subjected to attrition in an attrition cell.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: May 21, 1996
    Assignee: Harbison-Walker Refractories Company
    Inventors: Tony Grondin, Jean-Guy St-Hilaire