Granted Patent
Utility
US 6,375,413 · App. 09/710,298
Vacuum pumps
Inventor:
Ian David Stones
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Nov 9, 2000
Inventor
Ian David Stones
Assignee (at issue)
The BOC Group plc
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.