Granted Patent
Utility
US 5,172,555 · App. 07/782,145
Device for expansion of liquefied gases
Inventor:
Wolfgang Schmidtke
Patented Case
View Patent ↗
Granted: Dec 22, 1992
Filed: Oct 28, 1991
Inventor
Wolfgang Schmidtke
Assignee (at issue)
Linde GmbH
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.