Granted Patent
Utility
US 6,348,688 · App. 09/233,703
Tandem time-of-flight mass spectrometer with delayed extraction and method for use
Inventor:
Marvin L. Vestal
Patented Case
View Patent ↗
Granted: Feb 19, 2002
Filed: Jan 19, 1999
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.