Granted Patent
Utility
US 4,275,052 · App. 06/146,946
Process for preparing high surface area aluminas
Inventor:
Ji-Yong Ryu
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: May 2, 1980
Inventor
Ji-Yong Ryu
Assignee (at issue)
UOP LLC
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.