Granted Patent
Utility
US 5,439,587 · App. 08/098,171
Self priming filter apparatus
Inventors:
Ralph Stankowski, Michael C. Heath, Douglas A. Boucher
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Jul 27, 1993
Inventors
Ralph Stankowski
Michael C. Heath
Douglas A. Boucher
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.