by thermal or catalytic conversion of noxious components of exhaust

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust > for rendering innocuous > by thermal or catalytic conversion of noxious components of exhaust

CPC:

Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00) > for rendering innocuous (using electric or electrostatic separators F01N3/01; chemical aspects B01D53/92) > by thermal or catalytic conversion of noxious components of exhaust

CPC subdivides this area 3x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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F01N 3/101 CPC only CPC only
F01N 3/103 CPC only CPC only
F01N 3/105 +2 CPC CPC only CPC only
F01N 3/18 characterised by methods of operation; Control since 1980 IPC+CPC Available in IPC and CPC
F01N 3/24 characterised by constructional aspects of converting apparatus (filtering in combination with catalytic reactors F01N3/035) since 1980 IPC+CPC Available in IPC and CPC