Granted Patent
Utility
US 4,825,353 · App. 06/895,879
Control of reactants in chemical engineering systems
Inventor:
David Jenkins
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Aug 12, 1986
Inventor
David Jenkins
Assignee (at issue)
British Steel Corporation
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.