Granted Patent
Utility
US 5,169,529 · App. 07/688,180
Liquid membrane modules with minimal effective membrane thickness and methods of making the same
Inventors:
Robert H. Carroll, Terry A. Barber, Bradley W. Reed
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Apr 22, 1991
Inventors
Robert H. Carroll
Terry A. Barber
Bradley W. Reed
Assignee (at issue)
Hoechst Celanese 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.