US PATENT SUBCLASS 148 / 703
.~.~.~ Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

95  DF  PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17}
559  DF  .~ Heating or cooling of solid metal {22}
688  DF  .~.~ Aluminum(Al) or aluminum base alloy {5}
703.~.~.~ Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum {1}
704  DF  .~.~.~.~> In fused state

DEFINITION

Classification: 148/703

Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum:

(under subclass 688) Process wherein a vacuum or a treating agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) specified as an element, compound, or composition other than air or water is utilized to treat aluminum or aluminum alloy.

SEE OR SEARCH THIS CLASS, SUBCLASS:

206, for carburizing or nitriding of metal using an externally supplied source.

240, for processes of coating metal utilizing a reactive agent that reacts with the metal.