Granted Patent
Utility
US 6,394,281 · App. 09/803,440
Ceramic filter element
Inventors:
Marcus A. Ritland, Dennis W. Readey, Richard N. Kleiner, Jack D. Sibold, Kyle Knudson, Steven Landin, Paul Thoen
Patented Case
View Patent ↗
Granted: May 28, 2002
Filed: Mar 9, 2001
Inventors
Marcus A. Ritland
Dennis W. Readey
Richard N. Kleiner
Jack D. Sibold
Kyle Knudson
Steven Landin
Paul Thoen
Assignee (at issue)
CoorsTek, 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.