Time temperature indicator
US3942467A · kind A · utility
55Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Jan 21, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system operable to signal the attainment of one or more preselected time-temperature integrals which monitor the temperature history of a product utilizes an organic compound which is subject to solvolysis with the generation of an acid, at least one base in an amount less than the stoichiometric equivalent of the acid generated, and a pH sensitive indicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.