Silica; Hydrates thereof, e.g. lepidoic silicic acid

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

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

Of 6 combined children, 3 exist in both systems.

3 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

C01B 33/122 CPC only CPC only
C01B 33/124 CPC only CPC only
C01B 33/126 +1 CPC CPC only CPC only
C01B 33/14 Colloidal silica, e.g. dispersions, gels, sols IPC+CPC Available in IPC and CPC
C01B 33/16 Preparation of silica xerogels +2 CPC IPC+CPC Available in IPC and CPC
C01B 33/18 Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof (preparation of aerogels by dehydrating gels C01B33/158; treatment to enhance the pigmenting or filling properties C09C) +2 CPC IPC+CPC Available in IPC and CPC