Azeotrope-like compositions containing sulfur hexafluoride...

Compositions – Vaporization – or expansion – refrigeration or heat or energy...

Reexamination Certificate

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C252S068000, C252S069000, C252S364000, C252S574000

Reexamination Certificate

active

07736529

ABSTRACT:
Provided are novel azeotrope-like compositions of SF6and N2O, as well as methods of using the same. Also provided are methods of using SF6compositions, including azeotrope-like compositions, including a method for suppressing an electric arc or corona discharge and a method for flame suppression. Further provided are electrical devices using such SF6compositions as a dielectric insulating gas and rigid closed-cell foams having such SF6compositions within the cells, wherein the foam is both thermally and electrically insulative.

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Reg. No. 2551-62-4 (sulfur hexafluoride), Nov. 16, 1984.
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Siddagangappa, M.C. et al., “Prediction of Breakdown Voltages of Binary Gas Mixtures in Uniform Electric Fields,” Electrical Insulation, IEEE Transactions on [see also Dielectrics and Electrical Insulation, IEEE Transactions on] vol. EI-19, Issue 4, Aug. 1984; pp. 359-361.

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