Granted Patent
Utility
US 4,481,102 · App. 06/526,866
Cracking with catalytically active amorphous silica
Inventors:
Dean A. Young, Jeffery W. Koepke
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Aug 25, 1983
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.