Granted Patent
Utility
US 4,600,498 · App. 06/715,510
Mild hydrocracking with a zeolite catalyst containing silica-alumina
Inventor:
John W. Ward
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Mar 22, 1985
Inventor
John W. Ward
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.