Granted Patent
Utility
US 5,200,161 · App. 07/878,916
Process for the separation of hydrogen cyanide from gases and waste gases
Inventors:
Joachim Fischer, Hubert Wolf, Manfred Diehl
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: May 6, 1992
Inventors
Joachim Fischer
Hubert Wolf
Manfred Diehl
Assignee (at issue)
Degussa AG
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.