Granted Patent
Utility
US 4,923,487 · App. 07/258,968
Cross flow diesel particulate trap
Inventors:
Douglas A. Bogart, Robert C. Schenck
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Oct 17, 1988
Inventors
Douglas A. Bogart
Robert C. Schenck
Assignee (at issue)
The Duriron Company, 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.