| 1/00 | Preparing the batches |
| 1/02 | Preparing the batches Compacting the glass batches, e.g. pelletising |
| 3/00 | Charging the melting furnaces |
| 3/02 | Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet |
| 5/00 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture |
| 5/02 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces |
| 5/027 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating |
| 5/03 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating Tank furnaces |
| 5/033 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces by using resistance heaters above or in the glass bath, i.e. by indirect resistance heating |
| 5/04 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces |
| 5/05 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces Discontinuously-working tank furnaces, e.g. day tanks |
| 5/06 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in pot furnaces |
| 5/08 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in pot furnaces Glass-melting pots |
| 5/10 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in combined tank furnaces and pots |
| 5/12 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in shaft furnaces |
| 5/14 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in revolving cylindrical furnaces |
| 5/16 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces |
| 5/167 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches (C03B 5/2, C03B 5/42 take precedence) |
| 5/173 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces Apparatus for changing the composition of the molten glass in glass furnaces, e.g. for colouring the molten glass (chemical aspects C03C) |
| 5/18 | Melting in furnaces; Furnaces so far as specially adapted for glass manufacture Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces Stirring devices; Homogenisation |