Granted Patent
Utility
US 5,404,918 · App. 08/117,302
Cryogenic liquid storage tank
Inventor:
Keith Gustafson
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Sep 3, 1993
Inventor
Keith Gustafson
Assignee (at issue)
Minnesota Valley Engineering, 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.