Granted Patent
Utility
US 4,664,776 · App. 06/866,704
Hydrocarbon zeolite catalyst employed in hydrocracking process
Inventor:
John W. Ward
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: May 27, 1986
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.