Granted Patent
Utility
US 4,980,331 · App. 07/363,234
Hydrogenation catalyst and hydrogenation process wherein said catalyst is used
Inventors:
Ronald J. Hoxmeier, Lynn H. Slaugh
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Jun 8, 1989
Inventors
Ronald J. Hoxmeier
Lynn H. Slaugh
Assignee (at issue)
SHELL OIL 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.