Patent ID: 9267922
Filing Date: 2016-02-23
CPC Classification: G01N

Claim Text:
1. A method for determining the purity or authenticity of a substance being transported in a container through a supply chain comprising: a. providing an entry transmitter for generating a first multi-frequency coded ultrasonic signal and an entry receiver for receiving said first signal after said first signal has passed through the container and through the substance; b. generating an entry identifier of the substance in the container based on said first ultrasonic signal; c. recording said entry identifier at an entry point of said supply chain; d. transporting the substance in the container to a destination; e. providing an exit transmitter for generating a second multi-frequency coded ultrasonic signal and an exit receiver for receiving said second signal after it has passed through the substance and the container; f. generating an exit identifier of the substance in the container based on said second ultrasonic signal; and, g. comparing said entry identifier and said exit identifier to determine whether the substance in the container has been altered during travel through the supply chain.