Granted Patent
Utility
US 4,650,502 · App. 06/466,263
Pressurized gaseous aqueous ammonia separation system
Inventor:
T. Phillip Cole, Jr.
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Feb 14, 1983
Inventor
T. Phillip Cole, Jr.
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.