Chemical base for fuel cell engine heat exchange coolant/antifreeze comprising 1,3-propanediol
US7452479B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Feb 13, 2002 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Mar 8, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A nontoxic fuel cell engine coolant which has an electrical resistivity of greater than 250 kOhm-cm, a boiling point of greater than 90° C., a freezing point of less than −40° C., a thermal conductivity of greater than 0.4 W/m-k, a viscosity of less than 1 cPs at 80° C., a viscosity of less than 6 cPs at 0°C., a heat capacity of greater than 3 kJ/kg-K, and which is compatible with current cooling system materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.