Granted Patent
Utility
US 4,456,499 · App. 06/400,570
Double crucible Czochralski crystal growth method
Inventor:
Wen-Bin Lin
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Jul 22, 1982
Inventor
Wen-Bin Lin
Assignee (at issue)
AT&T Technologies Incorporated
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.