Granted Patent
Utility
US 4,495,413 · App. 06/425,314
Process for calibrating ion-current amplifiers in mass spectrometers and mass spectrometer for carrying out the process
Inventors:
Heinz Lerche, Horst Rache, Reiner Wedde
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Sep 25, 1982
Inventors
Heinz Lerche
Horst Rache
Reiner Wedde
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.