Granted Patent
Utility
US 5,477,690 · App. 08/294,084
Liquid cryogenic storage tank system
Inventor:
Anker Gram
Patented Case
View Patent ↗
Granted: Dec 26, 1995
Filed: Aug 22, 1994
Inventor
Anker Gram
Assignee (at issue)
Process Systems International, 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.