B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
SHAPING
 B28
WORKING CEMENT, CLAY, OR STONE
 B28B
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B22C; working stone or stone-like material B28D; shaping of substances in a plastic state, in general B29C; making layered products not composed wholly of these substances B32B; shaping in situ, see the relevant classes of Section E)
 B28B

Note(s)

In this subclass, the following term is used with the meaning indicated:

  • "the material" means:
    1. clay or other ceramic compositions;
    2. slag;
    3. mixtures with water-setting properties given by clay, cementitious material, or slag.


 B28C
PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER (preparing material for foundry moulds B22C 5/00)
 B28C

Note(s)

In this subclass, the following terms or expressions are used with the meanings indicated:

  • "cement" or "mixtures of cement with other substances" includes plaster;
  • "clay" includes like ceramic compositions.


 B28D
WORKING STONE OR STONE-LIKE MATERIALS (machinery for, or methods of, mining or quarrying E21C)