Granted Patent
Utility
US 6,723,152 · App. 10/187,124
Gas separation using membranes formed from blends of perfluorinated polymers
Inventors:
Benjamin Bikson, Yong Ding, Johann Katz Leroux, Joyce K. Nelson
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Jul 1, 2002
Inventors
Benjamin Bikson
Yong Ding
Johann Katz Leroux
Joyce K. Nelson
Assignee (at issue)
Praxair Technology, 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.