Granted Patent
Utility
US 4,475,665 · App. 06/218,997
Air logic controller and metering pump unit for an apparatus for transferring, pumping and metering liquid chemicals
Inventor:
Patrick Norton
Patented Case
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Granted: Oct 9, 1984
Filed: Dec 22, 1980
Inventor
Patrick Norton
Assignee (at issue)
Chemical Handling Equipment Co., 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.