Granted Patent
Utility
US 5,429,866 · App. 08/161,460
Metallurgical silicon powder exhibiting low surface oxidation
Inventor:
Francis Dubrous
Patented Case
View Patent ↗
Granted: Jul 4, 1995
Filed: Dec 6, 1993
Inventor
Francis Dubrous
Assignee (at issue)
Pechiney Electrometallurgie
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.