Granted Patent
Utility
US 4,422,326 · App. 06/266,063
Method of ascertaining the state inside melting furnace for radioactive waste
Inventor:
Noriaki Sasaki
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: May 19, 1981
Inventor
Noriaki Sasaki
Assignee (at issue)
Doryokuro Kakunenryo Kaihatsu Jigyodan
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.