Granted Patent
Utility
US 4,576,712 · App. 06/686,499
Maintaining gas flow during transfer of solids in hydrocarbon conversion and gas-solid contacting processes
Inventor:
Arthur R. Greenwood
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Dec 26, 1984
Inventor
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.