Granted Patent
Utility
US 4,690,807 · App. 06/831,381
Process for the simultaneous absorption of sulfur oxides and production of ammonium sulfate
Inventor:
Abdus Saleem
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Feb 20, 1986
Inventor
Abdus Saleem
Assignee (at issue)
General Electric Environmental Services, 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.