Granted Patent
Utility
US 4,814,613 · App. 07/022,647
Collision cell for triple quadrupole tandem mass spectrometry
Inventors:
Wade L. Fite, Suhas Narayan Ketkar
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Mar 6, 1987
Inventors
Wade L. Fite
Suhas Narayan Ketkar
Assignee (at issue)
Extrel 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.