Granted Patent
Utility
US 6,302,957 · App. 09/670,715
Quartz crucible reproducing method
Inventors:
Makoto Ito, Hiroki Murakami
Patented Case
View Patent ↗
Granted: Oct 16, 2001
Filed: Sep 28, 2000
Inventors
Makoto Ito
Hiroki Murakami
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.