Granted Patent
Utility
US 6,820,601 · App. 10/646,210
Freeze-resistant positive crankcase ventilation valve
Inventors:
John Price, Michael Lindberg
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Aug 21, 2003
Inventors
John Price
Michael Lindberg
Assignee (at issue)
Daimlerchrysler AG
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.