Granted Patent
Utility
US 4,629,394 · App. 06/516,848
Centrifugal pump having low flow diffuser
Inventor:
Frank A. Leachman, Jr.
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Jul 25, 1983
Inventor
Frank A. Leachman, Jr.
Assignee (at issue)
Chandler Evans 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.