Other methods of steam generation; Steam boilers not provided for in other groups of this subclass

Child Classifications

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• F22B 3/02 involving the use of working media other than water
• F22B 3/04 by drop in pressure of high-pressure hot water within pressure-reducing chambers, e.g. in accumulators
• F22B 3/06 by transformation of mechanical, e.g. kinetic, energy into heat energy
• F22B 3/08 at critical or supercritical pressure values