Device containing a chemically sensitive wick for measuring the freshness of perishable foods, namely a small device in the form of a plastic tag integrated with food packaging that chemically senses compounds produced by spoiling food, and visually displays the state of a food's freshness and warns when the shelf-life has expired

'chemic':4,30 'compound':32 'contain':2 'devic':1,17 'display':39 'expir':55 'food':13,27,36,44 'form':20 'fresh':10,46 'integr':25 'life':53 'measur':8 'name':14 'packag':28 'perish':12 'plastic':23 'produc':33 'sens':31 'sensit':5 'shelf':52 'shelf-lif':51 'small':16 'spoil':35 'state':41 'tag':24 'visual':38 'warn':48 'wick':6

FRESHTAG

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