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US 2014/0311401 A1Published application
Freeze indicator
AssigneesInditechkorea Co., Ltd, Intellectual Discovery Co., Ltd.
InventorsJihoon PARK, Gilnam HONG
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Abstract
Provided is a freeze indicator, and more particularly, to a freeze indicator capable of easily confirming whether products are exposed to a freezing temperature or less using a development medium member containing a development material having hydrophobic property and moisture, and using diffusion characteristics of the development material into a development medium only when the moisture is frozen at a freezing temperature or less of the moisture.
Claims12
A freeze indicator comprising:
- a lower substrate;
- a development material member disposed on the lower substrate;
- a development medium member spaced apart from the development material member, disposed on the lower substrate and containing moisture;
- and
- an upper cover attached to the lower substrate and configured to block the development material member and the development medium member from the outside,
- wherein, when the freeze indicator starts an operation thereof, a development material is disposed around the development medium member, and the development material is diffused into the development medium member when exposed to a freezing temperature or less.
3 more elements
Dependencies are inferred from the claim text.