Granted Patent
Utility
US 4,666,879 · App. 06/774,830
Extruded copper chromite-alumina hydrogenation catalyst
Inventors:
Donald G. Kelly, Eugene Nebesh
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Sep 11, 1985
Inventors
Donald G. Kelly
Eugene Nebesh
Assignee (at issue)
Harshaw/Filtrol Partnership
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.