Granted Patent
Utility
US 4,640,677 · App. 06/704,830
Gas control device for controlling the fuel gas and oxidizing agent supply to a burner in an atomic absorption spectrometer
Inventor:
Bernhard Huber
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Feb 25, 1985
Inventor
Bernhard Huber
Assignee (at issue)
Bodenseewerk Perkin-Elmer GmbH
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.