Patents by Inventor Stefan Ryszard Witek

Stefan Ryszard Witek 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).

  • Sensors for the analysis of molten metals
    Patent number: 5656143
    Abstract: A solid electrolyte sensor to measuring the amount of trace elements, such as sulfur, in molten metals such as steel is provided wherein zirconia toughened strontium .beta.-alumina is used as the solid electrolyte. The resulting sensor is highly resistant to thermal shock, and is suitable for use with molten metals at temperatures of 1350.degree. C. or higher.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: August 12, 1997
    Assignee: Cookson Group PLC
    Inventors: Mark Andrew Swetnam, Lyn Holt, Stefan Ryszard Witek