US PATENT SUBCLASS 148 / 280
.~.~ Reactive material applied nonuniformly or reacted selectively

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}
280.~.~ Reactive material applied nonuniformly or reacted selectively

DEFINITION

Classification: 148/280

Reactive material applied nonuniformly or reacted selectively:

(under subclass 240) Subject matter wherein the reaction with the metal substrate is of a nonuniform nature.

(1) Note. Included herein, but not limited thereto, are metal treatments utilizing a mask to shield a portion of the metal surface and to expose a portion of the surface to be treated or chemical treatments involving a single side of a sheet material.