Granted Patent
Utility
US 4,416,736 · App. 06/223,070
Procedure for the enrichment of the element of interest from a solution for nonflame atomic absorption spectroscopy
Inventor:
Bernhard Huber
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Jan 6, 1981
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.