Granted Patent
Utility
US 5,656,566 · App. 08/417,877
Catalysts
Inventor:
Andrew Mark Ward
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Apr 6, 1995
Inventor
Andrew Mark Ward
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.