Granted Patent
Utility
US 4,800,019 · App. 07/184,799
Tubesheet for semipermeable membrane devices
Inventors:
Benjamin Bikson, Salvatore Giglia
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Apr 22, 1988
Inventors
Benjamin Bikson
Salvatore 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.