Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
David Otto Lewis0
Joseph Kuczynski0
Date of Patent
February 10, 2009
0Patent Application Number
112256760
Date Filed
September 13, 2005
0Patent Primary Examiner
Patent abstract
A method and apparatus of defining a time interval includes providing a source of ionizing radiation that radiates emissions thereof; placing a radiation sensitive display material responsive to ionizing radiation in a close proximity relationship to the source of ionizing radiation whereby the radiated emissions of the source strike the radiation sensitive display material, thereby commencing a time interval; and, measuring changes in characteristics of the radiation sensitive display material that are indicative of the elapsed time.
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