Granted Patent
Utility
US 5,830,421 · App. 08/675,065
Material and system for catalytic reduction of nitrogen oxide in an exhaust stream of a combustion process
Inventors:
Timothy J. Gardner, Stephen E. Lott, Steven Lockwood, Linda I. McLaughlin
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Jul 3, 1996
Inventors
Timothy J. Gardner
Stephen E. Lott
Steven Lockwood
Linda I. McLaughlin
Assignee (at issue)
Low Emissions Technologies Research and Development Partnership
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.