Granted Patent
Utility
US 5,674,384 · App. 08/546,107
Filter press with weight-responsive bumping of filter plates
Inventor:
David M. Higgins
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Oct 20, 1995
Inventor
David M. Higgins
Assignee (at issue)
JWI 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.