Granted Patent
Utility
US 6,432,197 · App. 09/929,585
Process for the preparation of non-oxygen precipitating Czochralski silicon wafers
Inventor:
Robert J. Falster
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Aug 14, 2001
Inventor
Robert J. Falster
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.