Granted Patent
Utility
US 4,313,021 · App. 06/194,154
Process for the conversion of aromatic hydrocarbons
Inventor:
Ji-Yong Ryu
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Oct 6, 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.