Patents by Inventor Peter Hajdu

Peter Hajdu 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 for the chemical utilization of coal by liquid phase oxidation
    Patent number: 4368333
    Abstract: The invention relates to an improved method for the liquid phase oxidation of coal performed with oxygen optionally in the presence of water. According to the invention oxidation is performed in the presence of a cooxidation partner selected from the group of liquid hydrocarbons and oxygen-containing liquid hydrocarbons, and if water is also present, the pH of the homogeneous solution formed from the cooxidation partner and water is maintained at a slightly acidic value.By the method of the invention the formation of carbon dioxide can be suppressed significantly.
    Type: Grant
    Filed: July 31, 1981
    Date of Patent: January 11, 1983
    Assignee: Tatabanyai Szenbanyak
    Inventors: Laszlo Kovacs, Galina Moger nee Eremineva, Dezso Gal, Peter Hajdu, Julia Lukacs, Erik Kroo, Istvan Nemes, Andras Nemeth, Katalin Szabo nee Mogyorosi, Geza Szentgyorgyi, Szilard Riederauer, Janos Szepvolgyi