Patents by Inventor Ivan Petkov Ratchev

Ivan Petkov Ratchev 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).

  • Production of ferronickel
    Patent number: 7585350
    Abstract: A process for producing a ferronickel product from a mixed nickel iron hydroxide product, said process including the steps of: providing a mixed nickel iron hydroxide product; pelletising the mixed nickel iron hydroxide product to produce nickel iron hydroxide pellets; calcining the nickel iron hydroxide pellets to produce mixed nickel iron oxide pellets; and reducing the nickel iron oxide pellets with one or more reducing gases at high temperatures to produce ferronickel pellets.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: September 8, 2009
    Inventors: Alexey Duarte, Houyuan Liu, Ivan Petkov Ratchev