Granted Patent
Utility
US 6,712,901 · App. 10/162,637
Surface modification process of quartz glass crucible
Inventors:
Toshio Tsujimoto, Yoshiyuki Tsuji
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Jun 6, 2002
Inventors
Toshio Tsujimoto
Yoshiyuki Tsuji
Assignee (at issue)
JAPAN SUPER QUARTZ 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.