Granted Patent
Utility
US 5,908,166 · App. 08/950,619
Process for iron ore pellets production
Inventors:
Geraldo Gonçalves Freitas, Marcelo Da Silva Kelin, Joao Julio Ruschid Tolentino
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Oct 15, 1997
Inventors
Geraldo Gonçalves Freitas
Marcelo Da Silva Kelin
Joao Julio Ruschid Tolentino
Assignee (at issue)
Companhia Vale do Rio Doce
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.