Granted Patent
Utility
US 4,669,890 · App. 06/715,695
Mixing device for vertical flow fluid-solid contacting
Inventor:
Claude F. Peyrot
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Mar 25, 1985
Inventor
Claude F. Peyrot
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.