Granted Patent
Utility
US 6,524,367 · App. 09/194,043
Hydrometallurgical process for the recovery of nickel and cobalt by ammoniacal leaching
Inventors:
Jose Castellanos Suarez, German A. Alvarez Villanueva, Ana Maria De La Cruz Fuxa, Pilar Martin Gonzalez, Isabel Lobaina Urtafe, Oscar Perez Laurencio, Milagros Escalona Rodiguez
Patented Case
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Granted: Feb 25, 2003
Filed: Jun 1, 2001
Inventors
Jose Castellanos Suarez
German A. Alvarez Villanueva
Ana Maria De La Cruz Fuxa
Pilar Martin Gonzalez
Isabel Lobaina Urtafe
Oscar Perez Laurencio
Milagros Escalona Rodiguez
Assignee (at issue)
Centro de Investigaciones Para la Industria Minero-Metalurgcia (CIPIMM)
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.