Granted Patent
Utility
US 6,309,471 · App. 09/549,653
Rapid removal of iodine stains
Inventors:
Kim R. Smith, Robert D. P. Hei, Mark Levitt
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Apr 14, 2000
Inventors
Kim R. Smith
Robert D. P. Hei
Mark Levitt
Assignee (at issue)
ECOLAB 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.