Granted Patent
Utility
US 5,019,145 · App. 07/443,529
Argon purification
Inventors:
Wilhelm Rohde, Horst Corduan
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Nov 30, 1989
Inventors
Wilhelm Rohde
Horst Corduan
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.