James R Strahle

US Patent:

20120107191, May 3, 2012

Filed:

Oct 12, 2011

Appl. No.:

13/317228

Inventors:

James R. Strahle - Braintree MA, US
Claudia Donnet - Arlington MA, US

International Classification:

G01N 21/78

US Classification:

422401

Abstract:

A food quality indicator includes a bio-indicator insert interposed between a gas-permeable, waterproof base and an impervious transparent cover, the base and the cover being sealed together about their peripheries to completely enclose the bio-indicator insert therebetween. The bio-indicator insert includes a porous substrate onto which a biosensor solution is applied, the biosensor solution being at least partially externally visible through the transparent cover. In use, the biosensor solution is adapted to change color within a defined color range that is dependent upon the concentration of amines detected. In this manner, the food quality indicator provides a visual indication of the state of microbial spoilage experienced by a food product in close proximity thereto. Due to its unitary, compact, durable and waterproof design, the food quality indicator can be used in a variety of potential applications and integrated into an array of different products, such as food storage containers.