Granted Patent
Utility
US 5,202,561 · App. 07/707,881
Device and method for analyzing ions of high mass
Inventors:
Ulrich Giessmann, Franz Hillenkamp, Michael Karas
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: May 31, 1991
Inventors
Ulrich Giessmann
Franz Hillenkamp
Michael Karas
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.