Granted Patent
Utility
US 6,183,542 · App. 09/188,128
Method and apparatus for purifying hydrogen
Inventor:
Peter R. Bossard
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Nov 9, 1998
Inventor
Peter R. Bossard
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.