Granted Patent
Utility
US 4,885,410 · App. 07/232,975
Hydrogenation catalyst
Inventor:
Waldo De Thomas
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Aug 17, 1988
Inventor
Waldo De Thomas
Assignee (at issue)
GAF Corporation
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.