Granted Patent
Utility
US 4,863,712 · App. 07/292,002
Catalysts for reforming hydrocarbon feedstocks
Inventors:
Martyn Vincent Twigg, William Maurice Sengelow
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Dec 30, 1988
Inventors
Martyn Vincent Twigg
William Maurice Sengelow
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.