Granted Patent
Utility
US 4,447,724 · App. 06/337,647
Apparatus for the chemical analysis of samples
Inventor:
Hans Oechsner
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Jan 7, 1982
Inventor
Hans Oechsner
Assignee (at issue)
Leybold-Heraeus 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.