Granted Patent
Utility
US 4,808,818 · App. 07/040,902
Method of operating a mass spectrometer and a mass spectrometer for carrying out the method
Inventor:
Gerhard Jung
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Apr 21, 1987
Inventor
Gerhard Jung
Assignee (at issue)
Finnigan MAT GmbH
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.