US PATENT SUBCLASS 148 / 614
.~.~.~.~ Starting material is spherulitic (i.e., spheroidal) or vermicular (i.e., wormlike)

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}
559  DF  .~ Heating or cooling of solid metal {22}
579  DF  .~.~ Iron(Fe) or iron base alloy {24}
612  DF  .~.~.~ Starting material contains 1.7 percent or more carbon (e.g., cast iron, etc.) {4}
614.~.~.~.~ Starting material is spherulitic (i.e., spheroidal) or vermicular (i.e., wormlike)

DEFINITION

Classification: 148/614

Starting material is spherulitic (i.e., spheroidal) or vermicular (i.e., wormlike):

(under subclass 612) Process wherein there is a spherulitic (i.e., spheroidal) or vermicular (i.e., wormlike) carbon state present in the starting iron alloy undergoing treatment.