Patents by Inventor Richard D. Daugherty

Richard D. Daugherty 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).

  • Analytical method for nonmetallic contaminates in silicon
    Patent number: 5427952
    Abstract: The present invention is a method for analyzing silicon for nonmetallic contaminants. The method comprises: (A) forming an alloy comprising silicon and a metal which promotes separation of nonmetallic contaminants present in the alloy, (B) separating the nonmetallic contaminants from the alloy, and (C) analyzing the separated nonmetallic contaminants for chemical content. The present invention is particularly useful for analyzing metallurgical grade silicon intended for use in the direct process for the production of organohalosilanes for the presence of oxides and carbides of calcium, aluminum, and silicon.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: June 27, 1995
    Assignee: Dow Corning Corporation
    Inventors: Richard D. Daugherty, Roland L. Halm, Charles S. Kuivila