Top IPC subclasses
1
|
C04B
|
10
|
Lime; magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone; ceramics; refractories; treatment of natural stone
|
2
|
C03C
|
1
|
chemical composition of glasses, glazes, or vitreous enamelssurface treatment of glasssurface treatm
|
3
|
C09D
|
1
|
coating compositions, e.g. paints, varnishes, lacquersfilling pasteschemical paint or ink removersin
|