Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
October 14, 2008
Patent Application Number
10749685
Date Filed
December 31, 2003
Patent Citations Received
Patent Primary Examiner
Patent abstract
A timing device for visually determining the passage of a preselected period of time including a redox indicator and a metal salt wherein the indicator undergoes an observable change in color which is related to the desired preselected period of time.
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