Granted Patent
Utility
US 6,551,054 · App. 09/869,375
Method and apparatus for pumping a material and a rotor for use in connection therewith
Inventors:
Kari Peltonen, Reijo Vesala, Vesa Vikman
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Aug 6, 2001
Inventors
Kari Peltonen
Reijo Vesala
Vesa Vikman
Assignee (at issue)
Sulzer Pumpen AG
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.