|  | C |
SECTION C — CHEMISTRY AND METALLURGY

|  | C |
Note(s) Definitions for Section C: Alkali metals: Li, Na, K, Rb, Cs, Fr Alkaline earth metals: Ca, Sr, Ba, Ra Lanthanides: elements with atomic numbers 57 to 71 inclusive Rare earths: Sc, Y, Lanthanides Actinides: elements with atomic numbers 89 to 103 inclusive Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W Halogens: F, Cl, Br, I, At Noble gases: He, Ne, Ar, Kr, Xe, Rn Platinum group: Os, Ir, Pt, Ru, Rh, Pd Noble metals: Ag, Au, Platinum group Light metals: alkali metals, alkaline earth metals, Be, Al, Mg Heavy metals: metals other than light metals Iron group: Fe, Co, Ni Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens Metals: elements other than non-metals Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

CHEMISTRY

|  | C04 |
CEMENTS; CERAMICS, etc.; SOUND OR THERMAL INSULATING MATERIALS

|  | C04 |
Note(s) This class does not include mechanical features provided for elsewhere, e.g. mechanical working Fulltext... Hierarchy... Expanded...B28, mechanical aspects of coating, e.g. applying glazes by brushing, dipping, spraying, Fulltext... Hierarchy... Expanded...B44, kilns Fulltext... Hierarchy... Expanded...F27.

|  | C04B |
LIME; CEMENTS; CERAMICS (glass ceramics Fulltext... Hierarchy... Expanded...C03C 3/22); STONE OR THE LIKE; SOUND OR THERMAL INSULATING MATERIALS