Granted Patent
Utility
US 6,817,345 · App. 10/248,121
Carbon Impregnation of porous ducting for evaporative emissions absorption
Inventor:
Donald M. Lawrence
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Dec 19, 2002
Inventor
Donald M. Lawrence
Assignee (at issue)
FORD GLOBAL TECHNOLOGIES, LLC
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.