Patents by Inventor Stephen A. Blaskovich

Stephen A. Blaskovich 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).

  • Refining of bismuth
    Patent number: 5234492
    Abstract: An improved process for deleading debismuthized dross is provided wherein the upgraded dross is treated by cupellation to form a slag until the level of bismuth in the upgraded dross reaches about 45% by weight. After cupellation, the partially deleaded upgraded dross may be treated by conventional means such as halogenation to provide a substantially pure bismuth product.
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: August 10, 1993
    Assignee: ASARCO Incorporated
    Inventors: Funsho K. Ojebuoboh, Stephen A. Blaskovich