Granted Patent
Utility
US 5,176,887 · App. 07/772,317
Treating emissions from engines fueled by compressed natural gas
Inventors:
Somasundaram Subramanian, William L. H. Watkins, Mohinder S. Chattha
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Oct 7, 1991
Inventors
Somasundaram Subramanian
William L. H. Watkins
Mohinder S. Chattha
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.