Granted Patent
Utility
US 6,463,843 · App. 09/789,889
Pump liner
Inventor:
Fredrick B. Pippert
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Feb 21, 2001
Inventor
Fredrick B. Pippert
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.