Granted Patent
Utility
US 4,258,025 · App. 06/090,676
Pd/SiO.sub.2 Hydrogenation catalyst suitable for H.sub.2 O.sub.2 manufacture
Inventor:
Harry B. Copelin
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Nov 2, 1979
Inventor
Harry B. Copelin
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.