US PATENT SUBCLASS 148 / 582
.~.~.~.~ Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum


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}
581  DF  .~.~.~ Railway stock (e.g., rails, wheels, axles, etc.) {4}
582.~.~.~.~ Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum


DEFINITION

Classification: 148/582

Treating with specified agent (e.g., heat exchange agent,

protective agent, decarburizing agent, denitriding agent, etc.) or vacuum:

Process under 581 wherein a vacuum or a treating agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) specified as an element, compound or composition other than air or water is utilized to treat the iron or iron alloy.