Granted Patent
Utility
US 4,537,871 · App. 06/602,648
Carbonylation catalyst
Inventor:
Nabil Rizkalla
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Apr 23, 1984
Inventor
Nabil Rizkalla
Assignee (at issue)
The Halcon SD Group, Inc.
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.