Granted Patent
Utility
US 4,104,131 · App. 05/703,407
Process for separating ammonia and acid gases from waste waters containing fixed ammonia salts
Inventors:
William J. Didycz, Donald Glassman, Edward E. Maier, George T. Saniga
Patented Case
View Patent ↗
Granted: Aug 1, 1978
Filed: Jul 8, 1976
Inventors
William J. Didycz
Donald Glassman
Edward E. Maier
George T. Saniga
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.