Granted Patent
Utility
US 6,250,880 · App. 09/299,038
Rotary pump with exclusively hydrodynamically suspended impeller
Inventors:
John Woodard, Peter Andrew Watterson, Geoffrey Douglas Tansley
Patented Case
View Patent ↗
Granted: Jun 26, 2001
Filed: Apr 23, 1999
Inventors
John Woodard
Peter Andrew Watterson
Geoffrey Douglas Tansley
Assignee (at issue)
Ventrassist Pty Ltd.
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.