Granted Patent
Utility
US 6,797,972 · App. 10/235,644
Neutron shielding materials and a cask for spent fuel
Inventors:
Mamoru Kamoshida, Masashi Oda, Takashi Nishi, Kiminori Iga, Masashi Shimizu
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Sep 6, 2002
Inventors
Mamoru Kamoshida
Masashi Oda
Takashi Nishi
Kiminori Iga
Masashi Shimizu
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.