Temperature indicating compositions
US3946612A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1973 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Sep 17, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K13/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Temperature indicating compositions are provided for use in disposable thermometers comprising a heat-conductive carrier sheet having at least one but preferably a plurality of regions (cavities) thereon, each region containing a thermally responsive substance which undergoes a change in state at a precise and predetermined temperature different from any other region. The thermally responsive materials used herein as temperature indicating compositions are solid solutions comprised of two components which, inter alia, have linear temperature-composition liquidous curves. The change of state of the solid solution in each region is readily detectable visually by an indicator system which is intimately associated with the solid solution in said regions in order to permit rapid and accurate visual determination of the temperature of the test subject.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.