US PATENT SUBCLASS 505 / 918
.~.~ With metallurgical heat treating

Current as of: June, 1999
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505 /   HD   SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS

825  DF  APPARATUS, PER SE, DEVICE, PER SE, OR PROCESS OF MAKING OR OPERATING SAME {36}
917  DF  .~ Mechanically manufacturing superconductor: (Classes 29, 72, and 228) {8}
918.~.~ With metallurgical heat treating {1}
919  DF  .~.~.~> Reactive formation of superconducting intermetallic compound {2}

DEFINITION

Classification: 505/918

With metallurgical heat treating:

(under subclass 917) Subject matter including thermal treatment, other than a simple anneal or stress relief, to effect a permanent chemical or physical change in the properties of a metal workpiece.