Granted Patent
Utility
US 4,264,215 · App. 06/076,195
Separable blade impeller
Inventors:
Erwin J. Nunlist, Vincent J. Piarulli, Franklyn J. Amorse
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Sep 17, 1979
Inventors
Erwin J. Nunlist
Vincent J. Piarulli
Franklyn J. Amorse
Assignee (at issue)
Sybron Corporation
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.