Granted Patent
Utility
US 6,430,248 · App. 09/468,317
Dry radioactive substance storage facility
Inventors:
Masashi Shimizu, Koichi Maki, Keiichiro Shibata, Masashi Oda, Naoki Kumagai, Hidetoshi Kanai
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Dec 21, 1999
Inventors
Masashi Shimizu
Koichi Maki
Keiichiro Shibata
Masashi Oda
Naoki Kumagai
Hidetoshi Kanai
Assignee (at issue)
HITACHI, 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.