US PATENT SUBCLASS 470 / 32
.~.~.~ Formed by heat treatment

Current as of: June, 1999
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470 /   HD   THREADED, HEADED FASTENER, OR WASHER MAKING: PROCESS AND APPARATUS

1  DF  PROCESS {5}
27  DF  .~ Making headed fastener, e.g., rivet or nail, etc. {2}
28  DF  .~.~ Rivet type {3}
32.~.~.~ Formed by heat treatment {1}
33  DF  .~.~.~.~> And pressure, e.g., forging

DEFINITION

Classification: 470/32

Formed by heat treatment:

(under subclass 28) Subject matter having a step of heating or cooling the fastener to produce desired properties or conditions.