Granted Patent
Utility
US 5,734,162 · App. 08/641,260
Method and apparatus for selectively trapping ions into a quadrupole trap
Inventor:
Jerry T. Dowell
Patented Case
View Patent ↗
Granted: Mar 31, 1998
Filed: Apr 30, 1996
Inventor
Jerry T. Dowell
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.