Patents by Inventor Louis John Petrovic

Louis John Petrovic 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 removal of sulfur from coal
    Patent number: 3960513
    Abstract: A process for reducing the amount of free and combined sulfur, such as pyritic, organic or elemental sulfur in coal; removing of these sulfur species may be made in an acid, basic or neutral solutions; at least 50 percent and up to 90 percent of sulfur, by weight, originally present in coal may be removed.
    Type: Grant
    Filed: March 29, 1974
    Date of Patent: June 1, 1976
    Assignee: Kennecott Copper Corporation
    Inventors: Jagdish Chandra Agarwal, Richard Andre Giberti, Louis John Petrovic