Granted Patent
Utility
US 5,603,900 · App. 08/444,493
Vacuum filter device
Inventors:
Phillip Clark, Brian Foley, Aldo M. Pitt
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: May 19, 1995
Inventors
Phillip Clark
Brian Foley
Aldo M. Pitt
Assignee (at issue)
Millipore Investment Holdings, Ltd.
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.