Granted Patent
Utility
US 6,633,041 · App. 10/245,656
Method for analyzing the mass of a sample using a cold cathode ionization source mass filter
Inventor:
Thomas E. Felter
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: Sep 16, 2002
Inventor
Thomas E. Felter
Assignee (at issue)
Sandia National Laboratory
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.