Granted Patent
Utility
US 4,902,197 · App. 07/206,212
Seal arrangement for a centrifugal type of pump
Inventors:
Richard O. Rhodes, Stephan B. Sears, Dan M. Pomeroy
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Jun 13, 1988
Inventors
Richard O. Rhodes
Stephan B. Sears
Dan M. Pomeroy
Assignee (at issue)
Superstill Technology, 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.