Granted Patent
Utility
US 4,738,786 · App. 06/873,690
Pressure filter enclosure
Inventor:
Richard H. Wykoff
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: Jun 12, 1986
Inventor
Richard H. Wykoff
Assignee (at issue)
AMSTED INDUSTRIES INCORPORATED
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.