Granted Patent
Utility
US 4,287,720 · App. 06/096,407
Cryogenic liquid container
Inventor:
Alfred Barthel
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Nov 21, 1979
Inventor
Alfred Barthel
Assignee (at issue)
Union Carbide Corporation
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.