Granted Patent
Utility
US 5,779,449 · App. 08/632,303
Separable, multipartite impeller assembly for centrifugal pumps
Inventor:
Manfred Klein
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: Apr 15, 1996
Inventor
Manfred Klein
Assignee (at issue)
Ansimag Incorporated
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.