Granted Patent
Utility
US 4,945,774 · App. 07/283,623
Sample treatment apparatus
Inventors:
Nigel W. Beard, Robert B. Phillips, Paul R. Stonestreet
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Dec 13, 1988
Inventors
Nigel W. Beard
Robert B. Phillips
Paul R. Stonestreet
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.