Granted Patent
Utility
US 4,818,869 · App. 07/053,448
Method of isolating a single mass or narrow range of masses and/or enhancing the sensitivity of an ion trap mass spectrometer
Inventor:
Michael Weber-Grabau
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: May 22, 1987
Inventor
Michael Weber-Grabau
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.