Patents by Inventor Witold Tecza

Witold Tecza 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).

  • Process for the production of hydroxy-aromatic substances
    Patent number: 6107527
    Abstract: The process for the production of hydroxy aromatic substances by means of catalytic oxidation of isoalkyl aromatic substance with oxygen, and decomposition of the hydroperoxide thus formed, is based on the concept that isoalkylaromatic substances are emulsified with an aqueous catalyst solution and brought to a temperature ranging from 50.degree. C. up to the boiling temperature of the emulsion; thereupon the oxygen is allowed to act for 2 to 20 hours and the hydroperoxide formed decomposed, in the presence of an inorganic acid as catalyst, into an hydroxyaromatic substance and a ketone.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: August 22, 2000
    Assignee: Rutgers Kureha Solvents GmbH
    Inventors: Zbigniew Stec, Jan Zawadiak, Ulrich Knips, Robert Zellerhoff, Danuta Gilner, Beata Orlinska, Jerzy Polaczek, Witold Tecza, Zofia Machowska