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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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CHEMICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
NOTE
-
Attention is drawn to the note following the title of Class D01

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Treatment of vegetable material
D01C 1/02
.
By chemical methods to obtain bast fibres
.
Bacteriological retting
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Treatment of animal material, e.g. chemical scouring of wool (recovery of lanolin or wool wax C11B 11/00)
D01C 3/02
.
De-gumming silk
Carbonising rags,
{
threads or fabrics
}
to recover animal fibres,
{
i.e. chemical removal of vegetable impurities (treatment of threads or fabrics of animal fibres for other purposes than removal of vegetable impurities D06L or D06M)
}
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Last Modified: 10/10/2013