Cooperative Patent Classification

CPC Definition - Subclass C12Y

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Last Updated Version: 2016.11
Definition statement

This place covers:

Enzymes of which the EC number is known.

In this subclass, each enzyme is classified according to their EC number of the "Enzyme Nomenclature" (as valid on 1 January 2013) recommended by the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology.The EC number appears in the subgroups within parentheses and is reflected in the classification symbol: the EC number with the notation is rendered into a CPC symbol C12Y ABB/CCDDD (with no trailing zeroes at the end) where:


CPC symbol

a ranges from 1-6

A = 1-6

b ranges from 1-99(*)

B = 01-99

c ranges from 1-99(*)

C = 01-99

d ranges from 1-400(*)

D = 001-400

(*) not all numbers are used

Examples: Alcohol dehydrogenase: EC 101/01001

Togavirin: EC 304/2109

Hepsin: EC 304/21106

Cobaltochelatase EC 606/01002

Limiting references

This place does not cover:

A C12Y symbol can only be allocated in combination with other classes like the following:

Compositions containing enzymes and use of the compositions and compounds for preservation of bodies of humans or animals or parts thereof

Compositions containing enzymes and use of the compositions and compounds for preservation of plants or parts thereof

Biocides, pest repellents or attractants or plant growth regulators containing enzymes

Bakery products which contain enzymes

Foods or foodstuffs containing or treated with enzymes

Preparations for medical dental or toilet purposes containing enzymes

Medical preparations containing nucleic acids encoding enzymes

Medical preparations containing genetic material encoding enzymes which is inserted into cells of the living body to treat genetic diseases; Gene therapy

Methods or apparatus for disinfecting or sterilising contact lenses in combination with enzymes

Bandages, dressings or absorbent pads for physiological fluids containing enzymes

Material for protheses subjected to enzyme treatment prior to implantation

Protease inhibitors

Antibodies against enzymes

Detergent compositions containing enzymes

Preparation of malt

Apparatus for enzymology


Carrier-bound or immobilised enzymes

Treatment of enzymes with electrical or wave energy

Nucleic acids encoding (part of) enzymes

Antisense nucleotides against enzymes

Preparation of compounds using enzymes

Measuring or testing processes involving enzymes; Compositions therefore (including complete kits, test papers etc); Preparing such compositions

Immunoassays for enzymes

Special rules of classification
  • This subclass is for discretionary supplementary classification of subject matter already classified as such in other classification places like the ones above.
  • Rules for use of C12Y together with any of the subgroups above are specific for each subgroup and can be found with the relevant subgroup.