Patents by Inventor Ladislas C. Matsch

Ladislas C. Matsch 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).

  • Heavy metal removal from wastewater sludge
    Patent number: 4193854
    Abstract: Insoluble heavy metal sulfides in activated sludge are converted by biochemical oxidation to soluble sulfates, followed by deposition of metals on cathode from sludge as electrolytic bath.
    Type: Grant
    Filed: November 21, 1978
    Date of Patent: March 18, 1980
    Assignee: Union Carbide Corporation
    Inventors: Raymond F. Drnevich, Ladislas C. Matsch, Embar G. Srinath
  • Nitrification-denitrification of wastewater
    Patent number: 4173531
    Abstract: In activated sludge-type wastewater treatment, nitrified oxygenated liquid-solid from the oxic zone is retained under anoxic conditions for denitrification and release of nitrogen gas, and the denitrified liquid-solid returned to the oxic zone.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: November 6, 1979
    Assignee: Union Carbide Corporation
    Inventors: Ladislas C. Matsch, Raymond F. Drnevich