Patents by Inventor Maria Stachowicz

Maria Stachowicz 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).

  • Method of extractive purification of residues from crude oil refining and heavy ends thereof
    Patent number: 4305813
    Abstract: The subject of the invention is a method of extractive purification of prcts of crude oil processing, especially of residues, of heavy ends, extracts and used oils, from tars of asphaltenes and other compounds.The process is conducted employing an extraction solvent and an additional substance having a limited miscibility with the extraction solvent. The substance constituting the additional solvent is appropriate for rapid obtaining of a distinct limit of phase separation.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: December 15, 1981
    Assignee: Biuro Projektow i Realizacji Inwestycji Rafinerii Nafty "BIPRONAFT"
    Inventors: Stanislaw Pobiegly, Roman Dulski, Lucjan Cichon, Hieronim Tworek, Maria Stachowicz, Jerzy Kowalik