US PATENT SUBCLASS 266 / 217
.~.~ Gaseous treating material

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

200  DF  MEANS FOR MELTING OR VAPORIZING METAL OR TREATING LIQUEFIED METAL {19}
216  DF  .~ By means introducing treating material {1}
217.~.~ Gaseous treating material {2}
218  DF  .~.~.~> Having fluid inlet formed in vessel wall, e.g., tuyere {5}
225  DF  .~.~.~> Lance {1}

DEFINITION

Classification: 266/217

(under subclass 216) Device wherein the added substance is in gaseous form.

(1) Note. Means introducing a gas stirring agent will be found in this and the indented subclasses.

SEE OR SEARCH CLASS

261, Gas and Liquid Contact Apparatus, appropriate subclasses, for devices of general utility for contacting a gas with a liquid.