Granted Patent
Utility
US 4,826,587 · App. 07/032,205
Hydrocracking process
Inventors:
John W. Ward, Timothy Carlson, William S. Millman
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Mar 30, 1987
Inventors
John W. Ward
Timothy Carlson
William S. Millman
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.