Granted Patent
Utility
US 4,720,972 · App. 06/919,947
Low energy regeneration system for particulate trap for an internal combustion engine
Inventors:
V. Durga Nageswar Rao, Wallace R. Wade
Patented Case
View Patent ↗
Granted: Jan 26, 1988
Filed: Oct 17, 1986
Inventors
V. Durga Nageswar Rao
Wallace R. Wade
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.