Granted Patent
Utility
US 5,681,438 · App. 08/656,138
Membrane module assembly
Inventor:
Andrew Proulx
Patented Case
View Patent ↗
Granted: Oct 28, 1997
Filed: May 31, 1996
Inventor
Andrew Proulx
Assignee (at issue)
Millipore 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.