Thermochromic level indicator
US5323652A · kind A · utility
26Cited by
2References
16Claims
0Family size
Inventor
Key dates
| Filing date | Feb 8, 1993 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Feb 8, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermochromic level indicator for determining the level of a material inside a container includes a temperature responsive strip including at least two thermochromic materials of different opacities and transition temperatures, the thermochromic materials with greater opacity having relatively lower transition temperatures than the thermochromic materials with lesser opacities. Other accurate thermochromic level indicators are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.