Granted Patent
Utility
US 5,407,877 · App. 07/984,449
Catalyst treatment process
Inventor:
John David Scott
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Dec 2, 1992
Inventor
John David Scott
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.