Granted Patent
Utility
US 4,256,266 · App. 05/971,266
Process to obtain anathase concentrates from an anathase ore
Inventor:
Gustavo Magalhaes
Patented Case
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Granted: Mar 17, 1981
Filed: Dec 20, 1978
Inventor
Gustavo Magalhaes
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.