Granted Patent
Utility
US 4,284,608 · App. 05/973,255
Process for regenerating sulfur dioxide gas scrubbing solutions
Inventor:
Leopold Pessel
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Dec 26, 1978
Inventor
Leopold Pessel
Assignee (at issue)
American Electronic 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.