Granted Patent
Utility
US 6,482,269 · App. 09/082,906
Process for the removal of copper and other metallic impurities from silicon
Inventors:
Larry W. Shive, Carissima M. Vitus
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: May 21, 1998
Inventors
Larry W. Shive
Carissima M. Vitus
Assignee (at issue)
MEMC Electronic Materials, Inc.
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.