CPC Definition - Subclass C14C

Last Updated Version: 2016.11
CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING (bleaching of leather or furs D06L; dyeing of leather or furs D06P)
Definition statement

This place covers:

Preparatory steps prior to tanning.

Chemical aspects of tanning (chemical compounds).

Impregnation of leather.

Coating of leather with polymers.

Devices such as drums for the chemical treatment of hides, skins or leather.

References
Limiting references

This place does not cover:

Gelatine for foodstuff

A23J 1/10

Layered products next to a fibrous layer

B32B

Peptides or collagen

C07K 14/78

Macromolecular products derived from leather

C08H 1/06

Polishing compositions

C09G 1/00

Preparation of glue or gelatine from leather scrap

C09H 1/04

Enzymes and Compositions thereof

C12N 9/00

Mechanical treatment or processing of skins, hides or leather

C14B

Artificial leather

D06N 3/00

Dyeing of leather

D06P 3/00

Informative references

Attention is drawn to the following places, which may be of interest for search:

Application of coating compositions onto the leather when surface-finishing of the leather

C09D 107/00 - C09D 201/00

Polyurea or polyurethane coatings

C09D 175/02 , C09D 175/04,

Special rules of classification

For the chemical treatment of hides, skins or leather several main group or subgroup classes can be given, if considered useful for search matters. Primarily the subject-matter disclosed in the examples of a patent document is to classified.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Liming

Treatment of hides or skins with lime solution or other alkalis e.g. caustic soda to destroy the hair or wool, remove proteins and fat

Pelt

Hide or skin in the dehaired or dewooled, limed, fleshed, perhaps bated (delimed) and scudded condition; Ready for tanning

Raw hide

Product made from bovine hides, freed from the hair and the flesh layer and dried out in the limed state

Suede

Leather with a velvet-like surface

Wet-blue

Hide or skin, subjected to the usual beamhouse processes, chrome-tanned and left wet

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

BOD

Biological oxygen demand

THP

Tetrakis(hydroxymethyl)phosphonium

In patent documents, the following words/expressions are often used as synonyms:

  • "drum", "vessel" and "vat"
Surface finishing of leather
Definition statement

This place covers:

The application of coating compositions onto the leather.

Special rules of classification

C14C 11/006 mainly covers the formation of polyurea or polyurethane coatings. Therefore, classification is also made in in groups C09D 175/02 and C09D 175/04.