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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS (polishing compositions C09G; detergents in general C11D)
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Cleaning or pickling metallic material with solutions or molten salts (with organic solvents C23G 5/02)
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C23G 1/02
.
with acid solutions
C23G 1/025
. .
{
acidic pickling pastes
}
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C23G 1/04
. .
using inhibitors
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C23G 1/06
. . .
organic inhibitors
NOTE
-
In groups C23G 1/061 to C23G 1/068 an invention is classified in the last appropriate place

C23G 1/061
. . . .
{
nitrogen-containing compounds
}
C23G 1/063
. . . .
{
heterocyclic compounds
}
C23G 1/065
. . . .
{
sulfur-containing compounds
}
C23G 1/066
. . . .
{
phosphorus-containing compounds
}
C23G 1/068
. . . .
{
compounds containing a C=C bond
}
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C23G 1/08
. .
Iron or steel
NOTE
-
In groups C23G 1/081 to C23G 1/088 an invention is classified in the last appropriate place

C23G 1/081
. . .
{
solutions containing H2SO4
}
C23G 1/083
. . .
{
solutions containing H3PO4
}
C23G 1/085
. . .
{
solutions containing HNO3
}
C23G 1/086
. . .
{
solutions containing HF
}
C23G 1/088
. . .
{
solutions containing organic acids
}
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C23G 1/10
. .
Other heavy metals
C23G 1/103
. . .
{
copper or alloys of copper
}
C23G 1/106
. . .
{
refractory metals
}
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C23G 1/12
. .
Light metals
C23G 1/125
. . .
{
aluminium
}
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C23G 1/14
.
with alkaline solutions
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C23G 1/16
. .
using inhibitors
C23G 1/18
. . .
Organic inhibitors
C23G 1/19
. .
Iron or steel
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C23G 1/20
. .
Other heavy metals
C23G 1/205
. . .
{
refractory metals
}
C23G 1/22
. .
Light metals
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C23G 1/24
.
with neutral solutions
C23G 1/26
. .
using inhibitors
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C23G 1/28
.
with molten salts
C23G 1/30
. .
using inhibitors
C23G 1/32
. .
Heavy metals
C23G 1/34
. .
Light metals
C23G 1/36
.
Regeneration of waste pickling liquors
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Apparatus for cleaning or pickling metallic material (with organic solvents C23G 5/04;
{
apparatus for continuously conveying articles into baths B65G
}
)
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C23G 3/02
.
for cleaning wires, strips, filaments continuously
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C23G 3/021
. .
{
by dipping
}
C23G 3/022
. . .
{
the objects following a helicoidal path
}
C23G 3/023
. .
{
by spraying
}
C23G 3/024
. .
{
by a combination of dipping and spraying
}
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C23G 3/025
. .
{
Details of the apparatus, e.g. linings or sealing means
}
C23G 3/026
. . .
{
for guiding the objects
}
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C23G 3/027
. .
{
Associated apparatus, e.g. for pretreating or after-treating
}
C23G 3/028
. . .
{
for thermal or mechanical pretreatment
}
C23G 3/029
. . .
{
for removing the pickling fluid from the objects
}
C23G 3/04
.
for cleaning pipes
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Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
NOTE
-
Mixtures of organic solvents are classified according to the major component

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C23G 5/02
.
using organic solvents
C23G 5/024
. .
containing hydrocarbons
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C23G 5/028
. .
containing halogenated hydrocarbons
C23G 5/02803
. . .
{
containing fluorine
}
C23G 5/02806
. . .
{
containing only chlorine as halogen atom
}
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C23G 5/02809
. . .
{
containing chlorine and fluorine
}
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C23G 5/02812
. . . .
{
Perhalogenated hydrocarbons
}
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C23G 5/02816
. . . . .
{
Ethanes
}
C23G 5/02819
. . . . . .
{
C2Cl3F3
}
C23G 5/02822
. . . . . .
{
C2Cl4F2
}
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C23G 5/02825
. . . .
{
containing hydrogen
}
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C23G 5/02829
. . . . .
{
Ethanes
}
C23G 5/02832
. . . . . .
{
C2H3Cl2F
}
C23G 5/02835
. . . . . .
{
C2H2Cl2F2
}
C23G 5/02838
. . . . . .
{
C2HCl2F3
}
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C23G 5/02841
. . . . .
{
Propanes
}
C23G 5/02845
. . . . . .
{
C3H3ClF4
}
C23G 5/02848
. . . . . .
{
C2H2Cl2F4
}
C23G 5/02851
. . . . . .
{
C2HCl2F5
}
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C23G 5/02854
. . .
{
characterised by the stabilising or corrosion inhibiting additives
}
C23G 5/02858
. . . .
{
Hydrocarbons
}
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C23G 5/02861
. . . .
{
Oxygen-containing compounds
}
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C23G 5/02864
. . . . .
{
Alcohols
}
C23G 5/02867
. . . . . .
{
aliphatic
}
C23G 5/0287
. . . . . .
{
aromatic
}
C23G 5/02874
. . . . .
{
Aldehydes or ketones
}
C23G 5/02877
. . . . .
{
Ethers
}
C23G 5/0288
. . . . .
{
Epoxy compounds
}
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C23G 5/02883
. . . .
{
Nitrogen-containing compounds
}
C23G 5/02887
. . . . .
{
Nitro-compounds
}
C23G 5/0289
. . . . .
{
N-heterocyclics
}
C23G 5/02893
. . . .
{
Sulfur-containing compounds
}
C23G 5/02896
. . . .
{
Phosphorus-containing compounds
}
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C23G 5/032
. .
containing oxygen-containing compound
C23G 5/036
. . .
having also nitrogen
C23G 5/04
. .
Apparatus
C23G 5/06
.
using emulsions
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Last Modified: 10/10/2013