Granted Patent
Utility
US 4,637,266 · App. 06/807,725
Process for sampling particulate matter passing from one treatment zone to another
Inventor:
Arthur R. Greenwood
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Dec 11, 1985
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.