Granted Patent
Utility
US 4,479,870 · App. 06/584,681
Use of lift gas in an FCC reactor riser
Inventors:
Harold U. Hammershaimb, David A. Lomas
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Feb 29, 1984
Inventors
Harold U. Hammershaimb
David A. Lomas
Assignee (at issue)
JOP Inc.
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.