Granted Patent
Utility
US 4,721,611 · App. 06/898,401
Hydrogen production
Inventors:
Alwyn Pinto, Ian Charles Jeffery
Patented Case
View Patent ↗
Granted: Jan 26, 1988
Filed: Aug 20, 1986
Inventors
Alwyn Pinto
Ian Charles Jeffery
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.