Granted Patent
Utility
US 5,976,355 · App. 08/574,585
Low residence time catalytic cracking process
Inventors:
Axel Johnson, Robert J. Gartside, Joseph L. Ross, Dennis A. Duncan
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Dec 14, 1995
Inventors
Axel Johnson
Robert J. Gartside
Joseph L. Ross
Dennis A. Duncan
Assignee (at issue)
Stone & Webster Engineering Corp.
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.