Granted Patent
Utility
US 6,770,870 · App. 10/023,203
Tandem time-of-flight mass spectrometer with delayed extraction and method for use
Inventor:
Marvin L. Vestal
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Dec 17, 2001
Inventor
Marvin L. Vestal
Assignee (at issue)
PerSeptive Biosystems Inc.
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.