Granted Patent
Utility
US 4,308,238 · App. 06/132,970
Catalyst flow dampener
Inventor:
Arthur R. Greenwood
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Mar 24, 1980
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.