Granted Patent
Utility
US 4,670,020 · App. 06/685,921
Carbon ignition temperature depressing agent and method of regenerating an automotive particulate trap utilizing said agent
Inventor:
Vemulapalli D. N. Rao
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Dec 24, 1984
Inventor
Vemulapalli D. N. Rao
Assignee (at issue)
Ford Motor Company
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.