US PATENT SUBCLASS 148 / 250
.~.~.~ Contains organic phosphorus or organic chromium compound

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}
250.~.~.~ Contains organic phosphorus or organic chromium compound

DEFINITION

Classification: 148/250

Contains organic phosphorus or organic chromium compound:

(under subclass 243) Subject matter wherein the liquid reactive coating composition contains at least one atom of phosphorus or chromium as part of an organic compound and which organic compound may or may not be chemically reactive with the metal substrate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

258+, for a liquid reactive coating composition containing elemental chromium or an inorganic chromium compound.