Granted Patent
Utility
US 4,431,836 · App. 06/426,016
Hydrogenation using chitin and chitosan based immobilized metal catalysts
Inventor:
Blaise J. Arena
Patented Case
View Patent ↗
Granted: Feb 14, 1984
Filed: Sep 28, 1982
Inventor
Blaise J. Arena
Assignee (at issue)
UOP LLC
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.