Granted Patent
Utility
US 4,746,444 · App. 07/011,534
Prevention of chip build-up in filtration equipment
Inventor:
John L. Creps
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Feb 6, 1987
Inventor
John L. Creps
Assignee (at issue)
Henry Filters, 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.