US PATENT SUBCLASS 148 / 612
.~.~.~ Starting material contains 1.7 percent or more carbon (e.g., cast iron, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~ Starting material contains 1.7 percent or more carbon (e.g., cast iron, etc.) {4}
613  DF  .~.~.~.~> Decarburizing
614  DF  .~.~.~.~> Starting material is spherulitic (i.e., spheroidal) or vermicular (i.e., wormlike)
615  DF  .~.~.~.~> Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum
616  DF  .~.~.~.~> Treating or producing white or malleable cast iron {1}

DEFINITION

Classification: 148/612

Starting material contains 1.7 percent or more carbon (e.g., cast iron, etc.):

(under subclass 579) Process wherein the iron alloy contains 1.7 percent or more carbon (e.g., cast iron, etc.).