Granted Patent
Utility
US 4,594,131 · App. 06/640,063
Process for removing ammonia and acid gases from process streams
Inventor:
Edward E. Maier
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Aug 13, 1984
Inventor
Edward E. Maier
Assignee (at issue)
United States Steel Corporation
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.