US PATENT SUBCLASS 148 / 277
.~.~ Metal oxide formed after applied coating

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}
277.~.~ Metal oxide formed after applied coating

DEFINITION

Classification: 148/277

Metal oxide formed after applied coating:

(under subclass 240) Subject matter wherein a reactive material is applied to the surface of a modified substrate and a reaction is caused thereby to convert the previously formed surface into an oxide layer.

(1) Note. This subclass provides for processes and compositions wherein the initial step of treating the elemental metal or alloy containing substrate with a chemical

reactant is not claimed (it must be disclosed as a process proper for subclass 240 and the claim is to the treating step of forming the metal oxide and to compositions therefore.