Time-temperature integrating indicator device with barrier material
US6435128B2 · kind B2 · utility
50Cited by
13References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Apr 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K3/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A time-temperature indicator device provides a visually observable indication of the cumulative thermal exposure of an object. The device includes a substrate having a diffusely light-reflective porous matrix and a backing. The backing includes on its surface a viscoelastic indicator material for contacting the substrate and a barrier material for substantially inhibiting the lateral and longitudinal flow of viscoelastic indicator material between the substrate and the backing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.