Granted Patent
Utility
US 5,725,633 · App. 08/656,953
Sulfonated polyimide gas separation membranes
Inventors:
Yurdagul F. Ozcayir, Gertrud Goetz, Benjamin Bikson
Patented Case
View Patent ↗
Granted: Mar 10, 1998
Filed: Jun 6, 1996
Inventors
Yurdagul F. Ozcayir
Gertrud Goetz
Benjamin Bikson
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.