ClassID:

85004

C01B33/142 - CPC Classification

Classification description:

Silicon; Compounds thereof; Silicon oxides; Hydrates thereof; Silica; Hydrates thereof, e.g. lepidoic silicic acid; Colloidal silica, e.g. dispersions, gels, sols; Preparation of hydrosols or aqueous dispersions by acidic treatment of silicates

Sub-classes:
Recent Application in this class: