CPC Definition - Subclass D01C
This place covers:
Chemical or biological treatment of natural filamentary or fibrous materials to obtain filaments or fibres that are subsequently used for spinning, i.e. the recovery of the fibres and/or filaments from natural materials. It also covers the carbonisation of rags and other fibrous materials to recover animal fibres. Please note that in this context "carbonisation" does not mean that carbon fibres are produced, but only that vegetable impurities are removed from the fibres, usually by an aqueous acidic treatment.
This subclass does not cover the treatment of fibrous materials after said materials have already been recovered from the natural materials, nor the treatment of fibrous materials after the filaments or fibres have been spun.
The chemical treatment of natural filamentary or fibrous materials after the filament/fibres have been recovered from their natural matrices is classified in D06M, with the exception of the carbonisation of rags made of animal fibres. In case of doubt, both classes should be allocated.
When a document is also related to a neighbouring field it should always be circulated to the related classifiers. In the cases where many different applications of the invention are claimed, the document should only be circulated to the exemplified or the most relevant technical field.
Attention is drawn to the following places, which may be of interest for search:
Mechanical treatment of natural filamentary or fibrous materials to obtain filaments or fibres for spinning | |
Chemical or biological treatment of natural fibrous material after it has been extracted from its natural matrix | |
Extraction of paper (pulp) fibres from natural materials such as wood (mechanical aspects) | |
Extraction of paper (pulp) fibres from natural materials such as wood (chemical aspects) |
In this place, the following terms or expressions are used with the meaning indicated:
Fibre | a relatively-short, elongated member of natural or artificial material; |
Filament | an endless or quasi-endless, elongated member of natural or artificial material |
Yarn | a unitary assembly of fibres, usually produced by spinning; |
Thread | an assembly of yarns or filaments, usually produced by twisting |
This place covers:
The treatment of vegetable materials to obtain fibres, e.g. enzymatic retting in the absence of living organisms
This place covers:
Retting in the presence of bacteria or other organisms.
This place covers:
The treatment of animal materials to obtain fibres, e.g. wool scouring, silk degumming.
Attention is drawn to the following places, which may be of interest for search:
Carbonisation of rags to obtain animals fibres | |
Recovery of lanolin or wool wax | |
De-sizing and industrial washing |
This place covers:
The carbonisation of rags or others fibrous materials to recover animal fibres.
"Carbonisation" does not mean that the fibres are carbonized, but only that vegetable impurities are removed from the fibres, usually by an aqueous acidic treatment.
Attention is drawn to the following places, which may be of interest for search:
Artificial filaments; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments | |
Treatment of threads or fabrics, e.g. dry-cleaning, washing or bleaching fibres, filaments, threads, Yarns or fabrics | |
Chemical or biological removal of vegetable impurities from threads or fabrics of animal fibres |