US PATENT SUBCLASS 148 / 287
.~.~.~ Oxide of iron formed


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}
240  DF  .~ Processes of coating utilizing a reactive composition which reacts with metal substrate or composition therefore {12}
284  DF  .~.~ Coating composition applied forms oxide coating {3}
287.~.~.~ Oxide of iron formed


DEFINITION

Classification: 148/287

Oxide of iron formed:

(under subclass 284) Subject matter wherein an oxide layer of iron is formed on an iron containing substrate.

(1) Note. This subclass provides for iron oxide formation regardless of the degree of oxide formation or the amount of iron in the metal containing substrate.