Granted Patent
Utility
US 5,052,892 · App. 07/471,340
High efficiency mixer impeller
Inventor:
Julian B. Fasano
Patented Case
View Patent ↗
Granted: Oct 1, 1991
Filed: Jan 29, 1990
Inventor
Julian B. Fasano
Assignee (at issue)
Chemineer, 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.