Granted Patent
Utility
US 4,654,455 · App. 06/871,968
Phosphorus containing alumina catalyst for the production of aromatics
Inventor:
Tai-Hsiang Chao
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Jun 9, 1986
Inventor
Tai-Hsiang Chao
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.