Electrical sensor for monitoring degradation of products...

Details Electrical sensor for monitoring degradation of products... Electrical sensor for monitoring degradation of products...

2007-08-22

2009-11-03

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S221000

Reexamination Certificate

active

07612325

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.

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patent: 6276214 (2001-08-01), Kimura et al.
patent: 2007/0166831 (2007-07-01), Watkins, Jr. et al.
patent: 361044339 (1986-03-01), None
patent: 2000356660 (2000-12-01), None
patent: WO 03/076953 (2003-09-01), None
patent: WO 2005/081930 (2005-09-01), None
“An Electrical Approach to Monitor Wire and Cable Thermal Oxidation Aging Condition Bas4ed on Carbon Black Filled Conductive Polymer Composite”, YangYang Sun et al., Journal of Polymer Science Jul 15, 2004.

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