US PATENT SUBCLASS 148 / 256
.~.~.~.~ Specified liquid or gaseous coating composition applied after reaction with phosphorus

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}
253  DF  .~.~.~ Contains phosphorus {6}
256.~.~.~.~ Specified liquid or gaseous coating composition applied after reaction with phosphorus {1}
257  DF  .~.~.~.~.~> Specified coating composition contains organic material

DEFINITION

Classification: 148/256

Specified liquid or gaseous coating composition applied after reaction with phosphorus:

(under subclass 253) Subject matter wherein a specified liquid or gaseous coating composition is applied subsequent to the process of coating the metal substrate with a liquid coating composition containing a reactive phosphorus atom in either elemental or compound form.

(1) Note. Specified for purpose of this subclass requires that at least one chemical atom of the coating material be identified in the claims. The term "organic" is not sufficient to be considered as being specified.

(2) Note. This subclass provides for processes and compositions wherein the actual step of chemically modifying a base substrate with a phosphorus containing reactant is not claimed and the claim itself is to the treating of a base which has already been reacted with a phosphorus material.