DIFF Subgroup
C01B 33/14 Colloidal silica, e.g. dispersions, gels, sols
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Silicon; Compounds thereof > Silicon oxides; Hydrates thereof > Silica; Hydrates thereof, e.g. lepidoic silicic acid > Colloidal silica, e.g. dispersions, gels, sols
CPC:
Silicon; Compounds thereof ( C01B21/00, C01B23/00 take precedence; persilicates C01B15/14; carbides C01B32/956) > Silicon oxides; Hydrates thereof > Silica; Hydrates thereof, e.g. lepidoic silicic acid > Colloidal silica, e.g. dispersions, gels, sols
IPC and CPC are identically structured here. All 6 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
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- C01B 33/141 Preparation of hydrosols or aqueous dispersions since 1980 +2 CPC IPC+CPC Available in IPC and CPC
- C01B 33/145 Preparation of hydroorganosols, organosols or dispersions in an organic medium since 1980 IPC+CPC Available in IPC and CPC
- C01B 33/146 After-treatment of sols (; preparation of hydroorganosols, organosols or dispersions in an organic medium from hydrosols C01B33/145) since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- C01B 33/155 Preparation of hydroorganogels or organogels since 1980 IPC+CPC Available in IPC and CPC