Granted Patent
Utility
US 5,030,780 · App. 07/558,697
Aromatic saturation process with a silica-alumina and zeolite catalyst
Inventors:
John W. Ward, Dennis D. Delaney
Patented Case
View Patent ↗
Granted: Jul 9, 1991
Filed: Jul 26, 1990
Inventors
John W. Ward
Dennis D. Delaney
Assignee (at issue)
Union Oil Company of California
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.