Granted Patent
Utility
US 4,411,869 · App. 06/470,428
Multiple stage reactor system
Inventors:
Joseph A. Kroushl, Arthur R. Greenwood
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Feb 28, 1983
Inventors
Joseph A. Kroushl
Arthur R. Greenwood
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.