Granted Patent
Utility
US 4,616,375 · App. 06/670,973
Cleaning device for jet pipes in TiO.sub.2 reactor
Inventor:
Frank Green
Patented Case
View Patent ↗
Granted: Oct 14, 1986
Filed: Nov 13, 1984
Inventor
Frank Green
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.