Granted Patent
Utility
US 5,356,459 · App. 08/083,604
Production and use of improved composite fluid separation membranes
Inventors:
Benjamin Bikson, Joyce K. Nelson
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Jun 30, 1993
Inventors
Benjamin Bikson
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.