Patents by Inventor George D. Calvert

George D. Calvert 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 for crystal growth of beta barium boratean
    Patent number: 5343827
    Abstract: A method of growing optical quality beta barium borate; crystals from a pure NaCl fluxed melt. The method comprises maintaining particular thermal field conditions throughout the melt and slowly cooling the melt to cause beta barium borate to crystallize from the melt. The rate of cooling may be at a rate of not greater than 3.degree. C. per day. The method may utilize a seed crystal, suspended into the melt, so that the beta barium borate may crystallize on the seed crystal.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: September 6, 1994
    Assignee: Crystal Technology, Inc.
    Inventors: Peter F. Bordui, George D. Calvert