Granted Patent
Utility
US 4,670,416 · App. 06/568,261
Nickel-based catalyst, its preparation and its application
Inventors:
Helmut Klimmek, Gunter Klauenberg
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Jan 4, 1984
Inventors
Helmut Klimmek
Gunter Klauenberg
Assignee (at issue)
Internationale Otrool Maatschappij Octropa B.V.
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.