Granted Patent
Utility
US 4,881,955 · App. 07/242,602
Method for gas separation using helically wound hollow fibers permeable membrane cartridge
Inventors:
Benjamin Bikson, Slavatore Giglia
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Sep 12, 1988
Inventors
Benjamin Bikson
Slavatore Giglia
Assignee (at issue)
Union Carbide Corporation
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.