Granted Patent
Utility
US 6,468,881 · App. 09/618,790
Method for producing a single crystal silicon
Inventors:
Takayuki Kubo, Masanori Kuwahara
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Jul 18, 2000
Inventors
Takayuki Kubo
Masanori Kuwahara
Assignee (at issue)
SUMITOMO METAL INDUSTRIES, LTD.
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.