Granted Patent
Utility
US 6,148,804 · App. 09/447,136
Duty cycling feature for the proportional purge solenoid to improve low flow resolution
Inventors:
William B. Blomquist, Sandra N. Thomson, Patrick T. McCourt, Yi Cheng
Patented Case
View Patent ↗
Granted: Nov 21, 2000
Filed: Nov 22, 1999
Inventors
William B. Blomquist
Sandra N. Thomson
Patrick T. McCourt
Yi Cheng
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.