Granted Patent
Utility
US 4,824,342 · App. 07/156,325
Chemical injector system for piston pumps
Inventor:
Michael D. Buck
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Feb 16, 1988
Inventor
Michael D. Buck
Assignee (at issue)
Hypro, LLC
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.