Granted Patent
Utility
US 4,359,864 · App. 06/275,077
Burn-out type cleaning means for particulate filter of engine exhaust system
Inventor:
John M. Bailey
Patented Case
View Patent ↗
Granted: Nov 23, 1982
Filed: Feb 5, 1981
Inventor
John M. Bailey
Assignee (at issue)
Caterpillar Tractor Co.
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.