Patents by Inventor George Bartich

George Bartich 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).

  • Method of producing metakaolin
    Patent number: 5792251
    Abstract: A method of forming powdered metakaolin for use as an additive in cement based materials comprising the steps of calcining kaolin so as to reduce the hydroxyl content thereof to produce a meta-stable material have an identifiable amorphousness, and pulverizing the meta-stable material into a powder having a particle size of 50 microns or less.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: August 11, 1998
    Assignee: North American Refractories Co.
    Inventors: William D. Smiley, George Bartich, Mike Stromberg, Randy Lemley, Robert L. Antram, Keith T. Snider