Granted Patent
Utility
US 4,348,272 · App. 06/170,373
Hydrogen utilization in fluid catalytic cracking
Inventor:
Hosheng Tu
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Jul 21, 1980
Inventor
Hosheng Tu
Assignee (at issue)
UOP LLC
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.