Granted Patent
Utility
US 5,457,315 · App. 08/179,844
Method of selective ion trapping for quadrupole ion trap mass spectrometers
Inventors:
Gregory J. Wells, Mingda Wang
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Jan 11, 1994
Inventors
Gregory J. Wells
Mingda Wang
Assignee (at issue)
Varian, Inc.
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.