Temperature indicators
US3955418A · kind A · utility
2Cited by
9References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1973 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Jul 31, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K3/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device capable of indicating the time/temperature history of a frozen product, comprises a strained article of elastomeric material having a glass/rubber transition temperature above the storage temperature of the frozen article and having the property of relaxing over a temperature range below the glass/rubber transition temperature at a rate which is dependent on the temperature, and an indicator for indicating the amount of relaxation of the article on change of temperature through the glass/rubber transition temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.