Granted Patent
Utility
US 4,771,172 · App. 07/053,359
Method of increasing the dynamic range and sensitivity of a quadrupole ion trap mass spectrometer operating in the chemical ionization mode
Inventors:
Michael Weber-Grabau, Stephen C. Bradshaw, John E. P. Syka
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: May 22, 1987
Inventors
Michael Weber-Grabau
Stephen C. Bradshaw
John E. P. Syka
Assignee (at issue)
Finnigan Corporation
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.