Granted Patent
Utility
US 4,723,076 · App. 06/862,623
Double focusing mass spectrometers
Inventor:
Robert Harold Bateman
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: May 13, 1986
Inventor
Robert Harold Bateman
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.