Granted Patent
Utility
US 5,125,940 · App. 07/657,662
In-line air filter apparatus
Inventors:
Kent Stanhope, Paul Simms
Patented Case
View Patent ↗
Granted: Jun 30, 1992
Filed: Feb 19, 1991
Inventors
Kent Stanhope
Paul Simms
Assignee (at issue)
CHAMPION LABORATORIES, INC.
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.