Granted Patent
Utility
US 6,702,554 · App. 10/088,946
Tank and a centrifugal pump for emptying the tank
Inventor:
Eric A. Sørensen
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: Mar 22, 2002
Inventor
Eric A. Sørensen
Assignee (at issue)
Emil Aarestrup Sørensen
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.