US PATENT SUBCLASS 148 / 521
.~.~.~ With metal fusion bonding

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}
519  DF  .~.~ Pipe or tube {2}
521.~.~.~ With metal fusion bonding

DEFINITION

Classification: 148/521

With metal fusion bonding:

(under subclass 519) Process which includes a step of metal fusion bonding of metal.

SEE OR SEARCH CLASS

219, Electric Heating, appropriate subclasses for processes of fusion bonding of metal, per se, by electric heating without a separate step involving significant heat treatment as defined in the notes under

95, of Class 148.

228, Metal Fusion Bonding, appropriate subclasses for processes of welding metal, per se, without a separate step involving significant heat treatment as defined in the notes under

95, of Class 148.