Granted Patent
Utility
US 4,548,705 · App. 06/645,920
Hydrocracking with catalytically active amorphous silica and zeolites
Inventors:
Dean A. Young, Jeffery W. Koepke
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Aug 29, 1984
Inventors
Dean A. Young
Jeffery W. Koepke
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.