Granted Patent
Utility
US 4,942,296 · App. 07/216,092
Super-critical fluid mass spectrometer
Inventor:
David S. Jones
Patented Case
View Patent ↗
Granted: Jul 17, 1990
Filed: Jul 7, 1988
Inventor
David S. Jones
Assignee (at issue)
VG Instruments Group Limited
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.