Granted Patent
Utility
US 6,139,632 · App. 09/430,166
Seed crystals, seed crystal holders, and a method for pulling a single crystal
Inventor:
Teruo Izumi
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Oct 29, 1999
Inventor
Teruo Izumi
Assignee (at issue)
Sumitomo Sitix 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.