Granted Patent
Utility
US 5,976,247 · App. 08/490,465
Surface-treated crucibles for improved zero dislocation performance
Inventors:
Richard L. Hansen, Larry E. Drafall, Robert M. McCutchan, John D. Holder, Leon A. Allen, Robert D. Shelley
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Jun 14, 1995
Inventors
Richard L. Hansen
Larry E. Drafall
Robert M. McCutchan
John D. Holder
Leon A. Allen
Robert D. Shelley
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.