Detection of unplanned waste stream diversion using RFIDs

Details Detection of unplanned waste stream diversion using RFIDs Detection of unplanned waste stream diversion using RFIDs

2008-03-06

2010-11-23

Hunnings, Travis R (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010100, C340S572100

Reexamination Certificate

active

07839264

ABSTRACT:
Unplanned waste stream diversions are detected through the use of Radio Frequency Identification (RFID) tags. Input bulk material coming into the facility is laced with multiple RFID tags, which are suspended in a colloidal state in the input bulk material. Incoming RFID tags are counted, and then re-counted as they leave the facility, either as part of a known waste material stream or as part of a finished product. If the incoming and outgoing counts differ, then a conclusion is reached that some of the incoming RFID tags are within an unplanned waste stream diversion.

REFERENCES:
patent: 7068170 (2006-06-01), Green
patent: 7504949 (2009-03-01), Rouaix et al.
patent: 2005/0212675 (2005-09-01), Green
patent: 2009/0224916 (2009-09-01), Angell et al.

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