Granted Patent
Utility
US 5,447,559 · App. 08/288,168
Hydrogen recovery by adsorbent membranes
Inventors:
Madhukar Bhaskara Rao, Shivaji Sircar, Joseph M. Abrardo, William Frederick Baade
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Aug 10, 1994
Inventors
Madhukar Bhaskara Rao
Shivaji Sircar
Joseph M. Abrardo
William Frederick Baade
Assignee (at issue)
Air Products and Chemicals, Inc.
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.