Granted Patent
Utility
US 4,900,428 · App. 06/906,327
Process for the catalytic cracking of vanadium-containing feedstocks
Inventor:
Zoltan Mester
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Sep 11, 1986
Inventor
Zoltan Mester
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.