Granted Patent
Utility
US 5,009,780 · App. 07/383,127
Multi-well filtration apparatus
Inventor:
Michael J. Sarrasin
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Jul 20, 1989
Inventor
Michael J. Sarrasin
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.