Thawing indication marker for frozen food
US6029601A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1997 |
| Grant date | Feb 29, 2000 |
| Priority date | — |
| Expiry date | Dec 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thawing indication marker for frozen food is disclosed for determining whether or not a frozen food has been thawed. It comprises a tube of an elastic transparent resin, the tube being bent at its center to form two separate containers. One container contains a colored gel-like liquid prepared from an edible starch and food color and the other container contains a gel-like liquid also prepared from an edible starch and food color which is different from the first food color. The marker is used by straightening the bent portion and applying it to frozen food. If the food undergoes thawing, as a result of being subjected to a temperature above the freezing point of water, the gels become less viscous and can intermingle. By virtue of the color difference, one can observe whether or not any intermingling of the two different colored gels has occurred and therefore, whether or not the food stuff has been subjected to non-thawing conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.