Granted Patent
Utility
US 6,722,129 · App. 10/324,282
Crank case ventilation system
Inventors:
Mark Criddle, William Marc Edward Brotherton
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Dec 19, 2002
Inventors
Mark Criddle
William Marc Edward Brotherton
Assignee (at issue)
Visteon Global Technologies, 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.