Granted Patent
Utility
US 4,312,646 · App. 06/077,705
Gas scrubbing tower
Inventors:
Volker Fattinger, Jurg Schneider
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Sep 21, 1979
Inventors
Volker Fattinger
Jurg Schneider
Assignee (at issue)
Ciba-Geigy
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.