Patents by Inventor Rostislav Didchenko

Rostislav Didchenko 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 forming an electrode from a sulfur containing decant oil feedstock
    Patent number: 5167796
    Abstract: A premium coke is produced from a decant oil resulting from the catalytic cracking of petroleum oil by selectively hydrodesulfurizing the decant oil and then subjecting the hydrodesulfurized decant oil to delayed coking.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: December 1, 1992
    Assignee: Ucar Carbon Technology Corporation
    Inventors: Rostislav Didchenko, Irwin C. Lewis
  • Upgrading of pyrolysis tar
    Patent number: 4762608
    Abstract: Pyrolysis tars are upgraded by hydrotreatment in the presence of a catalyst having a hydrogenation component and an acidic component. The treated pyrolysis tars are used to produce premium cokes useful in the production of graphite electrodes.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: August 9, 1988
    Assignee: Union Carbide Corporation
    Inventors: Rostislav Didchenko, Eric M. Dickinson
  • Upgrading of pyrolysis tar using acidic catalysts
    Patent number: 4740291
    Abstract: Pyrolysis tars are upgraded by hydrotreatment thereof in the presence of an acidic catalyst. The treated pyrolysis tars are used to produce premium cokes useful in the production of graphite electrodes.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: April 26, 1988
    Assignee: Union Carbide Corporation
    Inventors: Rostislav Didchenko, Eric M. Dickinson
  • Mesophase pitch feedstock from hydrotreated decant oils
    Patent number: 4645584
    Abstract: A feedstock for mesophase pitch is produced by hydrotreating a decant oil until there is from about 2 to about 3 hydrogen atoms per average molecule of the decant oil, and thereafter subjecting the hydrotreated decant oil to distilling to form a pitch.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: February 24, 1987
    Assignee: Amoco Corporation
    Inventors: Rostislav Didchenko, Irwin C. Lewis
  • Physical conversion of latent mesophase molecules to oriented molecules
    Patent number: 4511625
    Abstract: A process of spinning a pitch having less than 40% by weight mesophase into a pitch fiber having at least 70% by weight mesophase is described.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: April 16, 1985
    Assignee: Union Carbide Corporation
    Inventors: Faramarz Nazem, Rostislav Didchenko, David Fink
  • Rapid stabilization of polyacrylonitrile fibers prior to carbonization
    Patent number: 3954947
    Abstract: An improved process for producing carbon fibers by the pyrolysis of polyacrylonitrile fibers wherein the extended heat treatment heretofore required in order to stabilize the fiber structure so that it may be carbonized is completed in substantially shorter periods of time by effecting stabilization in an atmosphere containing both hydrogen chloride and oxygen. After the fibers have been thermally stabilized in this manner, they may be rapidly carbonized in times as short as one-half minute.
    Type: Grant
    Filed: November 17, 1972
    Date of Patent: May 4, 1976
    Assignee: Union Carbide Corporation
    Inventors: Rostislav Didchenko, Charles D. Amata