Granted Patent
Utility
US 4,715,947 · App. 06/934,511
Combination process for the conversion of a residual asphaltene-containing hydrocarbonaceous stream to maximize middle distillate production
Inventor:
Darrell W. Staggs
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Nov 24, 1986
Inventor
Darrell W. Staggs
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.