Granted Patent
Utility
US 4,829,040 · App. 07/064,213
Catalyst containing an intermediate pore molecular sieve for mild hydrocracking
Inventor:
John W. Ward
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Jun 19, 1987
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.