Granted Patent
Utility
US 4,775,291 · App. 07/078,408
Magnetic clutch drive and thrust balancing mechanism for rotary pumps
Inventors:
Samuel W. Culbertson, Robert R. Mellette
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: Jul 27, 1987
Inventors
Samuel W. Culbertson
Robert R. Mellette
Assignee (at issue)
Binks Manufacturing Company
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.