Granted Patent
Utility
US 6,709,598 · App. 09/530,255
Membrane filtration device
Inventor:
Steven R. Pearl
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Apr 26, 2000
Inventor
Steven R. Pearl
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.