Patents by Inventor Maria Stefanski

Maria Stefanski 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).

  • Dewatering method
    Patent number: 5180505
    Abstract: A method to improve dewatering of filter cakes in a filtration process. The method involves introducing a surfactant as a vapor or mist into a flow of steam and treating the filter cake with this gaseous mixture.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: January 19, 1993
    Inventors: Marek J. Stefanski, Maria Stefanski, Louis L. Sirois