Granted Patent
Utility
US 5,344,235 · App. 08/006,552
Erosion resistant mixing impeller
Inventors:
Ronald J. Weetman, Frederick W. Kehr, III, Thomas Alan Taylor, Jonathan C. Everdyke
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Jan 21, 1993
Inventors
Ronald J. Weetman
Frederick W. Kehr, III
Thomas Alan Taylor
Jonathan C. Everdyke
Assignee (at issue)
Federal Signal 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.