Patents by Inventor Mark A. Castelletti

Mark A. Castelletti 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).

  • Quartz fusion crucible
    Patent number: 6632086
    Abstract: A crucible for melting a silica for fusion of said silica into a desired shape. The crucible having a main body with inner and outer surfaces comprised of a refractory material. In addition, at least a portion of the inner surface includes a barrier layer comprised of a material selected from rhenium, osmium, iridium, and mixtures thereof.
    Type: Grant
    Filed: May 22, 2000
    Date of Patent: October 14, 2003
    Inventors: Stanley M. Antczak, Mark A. Castelletti, Frederic F. Ahlgren