Granted Patent
Utility
US 4,740,299 · App. 06/903,536
Filter assembly with threaded collection bowl
Inventors:
Peter Popoff, John F. Church, Walter H. Stone
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Sep 4, 1986
Inventors
Peter Popoff
John F. Church
Walter H. Stone
Assignee (at issue)
Parker-Hannifin 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.