Heating article including coloured heat indicator with improved visability and precision
US8647735B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2011 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Feb 17, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24901
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
This invention relates to a heating article (1) comprising a substrate (2) of which one of the surfaces (21) is equipped with a design (4), in the form of a coating layer with at least one pattern (41, 42), which comprises a thermochromic pigment composition with at least one SC thermochromic pigment that is lipid-sensitive under heat. According to the invention, the thermochromic pigment composition includes at least one thermostable pigment and composite pigment grains (43), which each include a core (430) including the semiconducting thermochromic pigment, and a solid, transparent and continuous envelope (431), formed by a mineral or organomineral material. The thermochromic pigment composition shows a reversible change in color in a thermal color-change area with an amplitude of no more than 40° C. within the range of variation of said temperature T1 of use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.