Granted Patent
Utility
US 4,955,717 · App. 07/376,228
Demand modulated atomization apparatus and method for plasma spectroscopy
Inventor:
William Henderson
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Jun 29, 1988
Inventor
William Henderson
Assignee (at issue)
Geochemical Services, 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.