Granted Patent
Utility
US 6,490,884 · App. 09/990,365
Process and device for production of oxygen and nitrogen
Inventors:
Herbert Schoenecker, Jurgen Voit
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Nov 23, 2001
Inventors
Herbert Schoenecker
Jurgen Voit
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.