Granted Patent
Utility
US 6,576,045 · App. 09/950,143
Multi-stage diesel particulate collector system with combined processes of inertial impaction, virtual impaction, and filtration
Inventors:
Z. Gerald Liu, C. Raymond Cheng
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Sep 10, 2001
Inventors
Z. Gerald Liu
C. Raymond Cheng
Assignee (at issue)
Fleetguard, 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.