Granted Patent
Utility
US 4,686,367 · App. 06/773,339
Method of operating quadrupole ion trap chemical ionization mass spectrometry
Inventors:
John N. Louris, John E. P. Syka, Paul E. Kelley
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Sep 6, 1985
Inventors
John N. Louris
John E. P. Syka
Paul E. Kelley
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.