Granted Patent
Utility
US 6,453,680 · App. 09/764,775
Liquid helium transport container with longitudinally-mounted external liquid nitrogen coolant tanks
Inventor:
Mark S. Allen
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Jan 16, 2001
Inventor
Mark S. Allen
Assignee (at issue)
Chart Inc.
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.