US PATENT SUBCLASS 148 / 318
.~.~.~ Ferrous (i.e., iron base)


Current as of: June, 1999
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148 /   HD   METAL TREATMENT

400  DF  STOCK {20}
316  DF  .~ Carburized or nitrided {2}
317  DF  .~.~ Nitrided {1}
318.~.~.~ Ferrous (i.e., iron base)


DEFINITION

Classification: 148/318

Ferrous (i.e., iron base):

(under subclass 317) Stock material which contains over 50 percent iron.