Granted Patent
Utility
US 6,647,736 · App. 10/438,616
Purge
Inventors:
Richard M. Heiden, Robert Roth, Brian T. Sullivan, Steven E. Wolfgram, Lori Ann Manning
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: May 15, 2003
Inventors
Richard M. Heiden
Robert Roth
Brian T. Sullivan
Steven E. Wolfgram
Lori Ann Manning
Assignee (at issue)
American Standard International 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.