Patent Number: 7,102,526

Title: Electronic time-temperature indicator and logger

Abstract: This invention covers improved electronic time-temperature indicators with a visual output, and other devices and methods by which the thermal history of a complex material, which may not obey a simple exponential Arrhenius law degradation equation, may be monitored, and the subsequent fitness for use of the tracked material may be quickly ascertained. In particular, the invention discloses a rapidly reprogrammable electronic time-temperature tag that may be easily customized with the thermal time-temperature stability profile of an arbitrary material, using electronic data transfer methods. Using this device, a single, low-cost, generic time-temperature tag may be mass-produced, and then subsequently programmed to mimic the stability characteristics of nearly any material of interest.

Inventors: Zweig; Stephen Eliot (Los Gatos, CA)


International Classification: G08B 17/00 (20060101)

Expiration Date: 9/05/02018