Granted Patent
Utility
US 6,402,462 · App. 09/508,880
Centrifugal pump with a floating ring seal
Inventor:
Jürgen Aenis Dipl.-Ing.
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Jun 16, 2000
Inventor
Jürgen Aenis Dipl.-Ing.
Assignee (at issue)
ALLWEILER GMBH
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.