Shelf-life monitoring sensor-transponder system

Details Shelf-life monitoring sensor-transponder system Shelf-life monitoring sensor-transponder system

2005-04-22

2009-02-24

Lieu, Julie (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S309160, C340S010100, C340S457000, C340S457400, C235S385000

Reexamination Certificate

active

07495558

ABSTRACT:
A perishable integrity indicator system includes a RFID transponder and a perishable integrity sensor. The RFID transponder includes a RF integrated circuit coupled with an antenna. The sensor monitors the time and temperature of the perishable. A freshness determining module receives time- and temperature-dependent measurement data from the perishable integrity sensor and determines a current freshness status. A communications interface to the RFID transponder permits a RFID reader to retrieve current freshness status data corresponding to the freshness status determined by the freshness determining module. The system further includes a power management module.

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