Granted Patent
Utility
US 4,767,422 · App. 07/035,783
Composite separation membranes and the preparation and use thereof
Inventors:
Benjamin Bikson, Salvatore Giglia, Gregory B. Kharas
Patented Case
View Patent ↗
Granted: Aug 30, 1988
Filed: Apr 8, 1987
Inventors
Benjamin Bikson
Salvatore Giglia
Gregory B. Kharas
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.