Granted Patent
Utility
US 4,835,963 · App. 06/901,483
Diesel engine particulate trap regeneration system
Inventor:
James A. Hardy
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Aug 28, 1986
Inventor
James A. Hardy
Assignee (at issue)
AlliedSignal, Inc.
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.