US PATENT SUBCLASS 148 / 264
.~.~.~ Contains an atom of chromium

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.~.~.~ Contains an atom of chromium {4}
265  DF  .~.~.~.~> Post chromium treatment with specified material (other than mere air drying)
266  DF  .~.~.~.~> Contains an atom of sulfur, selenium or tellurium
267  DF  .~.~.~.~> Contains trivalent chromium ion or reducing agent or an organic additive
268  DF  .~.~.~.~> Contains an atom or boron, silicon or metal atom other than alkali metal

DEFINITION

Classification: 148/264

Contains an atom of chromium:

(under subclass 243) Subject matter wherein a reactive liquid composition containing elemental chromium or inorganic chromium compound is applied to a metal substrate.

(1) Note. The chromium in elemental form or as part of an inorganic compound may or may not be reactive with the metal substrate.