Patent Number: 7,612,325

Title: Electrical sensor for monitoring degradation of products from environmental stressors

Abstract: An environmental degradation sensor for environmentally sensitive products such as food, pharmaceuticals or cosmetic products provides the degraded state and estimated remaining life of the product. The sensor is made of a polymeric matrix and conductive filler. A control agent, selected to adjust a reaction rate of the sensor to environmental conditions, allows correlation of an electrical property of the sensor to a degraded state of the product. The sensor may be integrated with a passive RFID to provide product identification and degradation status wirelessly via reader. The sensor improves product safety, reduces cost of premature product disposal and, combined with RFIDs, improves the security of products through combined product degradation monitoring and tracking.

Inventors: Watkins, Jr.; Kenneth S. (Dahlonega, GA), Morris; Shelby J. (Hampton, VA)


International Classification: H01J 40/14 (20060101); G06M 7/00 (20060101)

Expiration Date: 1/03/02017