US PATENT SUBCLASS 470 / 17
.~.~.~.~ 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}
8  DF  .~ Making externally threaded fastener, e.g., screw or bolt {2}
11  DF  .~.~ Bolt {1}
12  DF  .~.~.~ Having specific configuration {4}
17.~.~.~.~ Formed by heat treatment

DEFINITION

Classification: 470/17

Formed by heat treatment:

(under subclass 11) Subject matter having a step of heating or cooling the fastener to produce desired properties or conditions.