Printable irreversible minimum temperature indicator
US12392672B2 · kind B2 · utility
0Cited by
10References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2019 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Oct 16, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multi-event minimum temperature indicator that includes a substrate, at least two thermochromic compositions positioned on the substrate, and an optional top layer adhered to the substrate. Each thermochromic composition is positioned on a discrete area of the substrate, and the compositions provide a visual indication of exposure to progressively colder temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.