US PATENT SUBCLASS 148 / 517
.~.~ Subambient temperature


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}
516  DF  .~ Producing or treating layered, bonded, welded, or mechanically engaged article or stock as a final product {9}
517.~.~ Subambient temperature


DEFINITION

Classification: 148/517

Subambient temperature:

(under subclass 516) Process wherein any metal portion of the article or stock undergoing treatment is actually cooled to a temperature identified as either below ambient temperature or below 20 deg.C to control the internal physical structure

(i.e., microstructure) or chemical properties thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

577, for processes of treating nonlayered metal or metal alloy at subambient temperature.