Granted Patent
Utility
US 4,409,192 · App. 06/371,403
Gas scrubbing methods
Inventors:
Frederick Lichtner, Jean T. Rose
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Apr 26, 1982
Inventors
Frederick Lichtner
Jean T. Rose
Assignee (at issue)
Betz Laboratories, Inc.
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.