Granted Patent
Utility
US 4,900,711 · App. 07/172,267
Hydrotreating catalyst
Inventors:
Eugene Nebesh, Robert A. Plundo, Steven L. McMahon
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Mar 23, 1988
Inventors
Eugene Nebesh
Robert A. Plundo
Steven L. McMahon
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.