Powdered far-infrared radiator and method of making the same
US6597004B2 · kind B2 · utility
2Cited by
5References
8Claims
0Family size
Inventor
Key dates
| Filing date | Jul 10, 2002 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Jul 10, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/0659
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A powdered far-infrared radiator includes a quartz schist pulverized into a powder having a grain diameter not exceeding 6 &mgr;m and heat-treating the powder at or above 200° C. The quartz schist radiates far-infrared rays at an ordinary temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.