US PATENT SUBCLASS 148 / 267
.~.~.~.~ Contains trivalent chromium ion or reducing agent or an organic additive

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}
243  DF  .~.~ Liquid reactive coating composition utilized {16}
264  DF  .~.~.~ Contains an atom of chromium {4}
267.~.~.~.~ Contains trivalent chromium ion or reducing agent or an organic additive

DEFINITION

Classification: 148/267

Contains trivalent chromium ion or reducing agent or an organic additive:

(under subclass 264) Subject matter wherein the liquid

reactive coating composition contains at least one atom of chromium in trivalent form or contains a material disclosed or claimed as a reducing agent or contains an organic additive.