Granted Patent
Utility
US 5,932,007 · App. 08/868,405
Method and apparatus for securely supporting a growing crystal in a czochralski crystal growth system
Inventor:
Zhixin Li
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Jun 3, 1997
Inventor
Zhixin Li
Assignee (at issue)
General Signal Technology Corporation
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.