Granted Patent
Utility
US 5,871,564 · App. 08/876,749
Pressure swing adsorption apparatus
Inventor:
Norman R. McCombs
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Jun 16, 1997
Inventor
Norman R. McCombs
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.