| 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} |
| 266 | | .~.~.~.~ Contains an atom of sulfur, selenium or tellurium |