Cysteine endopeptidases (3.4.22)

Full Title

Hydrolases acting on peptide bonds, i.e. peptidases (3.4) > Cysteine endopeptidases (3.4.22)

Filing statistics

CPC C12Y 304/22 belongs to the parent subclass C12Y, which recorded 144,590 patent applications worldwide between 2013 and 2023. Annual filings grew from 9,773 in 2013 to 11,938 in 2023 (+22%), peaking at 15,970 applications in 2021. The most active applicants in class C12 are HARVARD UNIVERSITY (8,321 applications), CHINESE ACADEMY OF SCIENCES (7,486 applications) and UNIVERSITY OF CALIFORNIA (7,320 applications).

Source: EPO PATSTAT, worldwide filings

60 direct subcodes

Child Classifications

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C12Y 304/22001 Cathepsin B (3.4.22.1)
C12Y 304/22002 Papain (3.4.22.2)
C12Y 304/22003 Ficain (3.4.22.3)
C12Y 304/22004 Bromelain (3.4.22.4) (C12Y304/22032, C12Y304/22033 take precedence)
C12Y 304/22006 Chymopapain (3.4.22.6)
C12Y 304/22007 Asclepain (3.4.22.7)
C12Y 304/22008 Clostripain (3.4.22.8)
C12Y 304/2201 Streptopain (3.4.22.10)
C12Y 304/22014 Actinidain (3.4.22.14)
C12Y 304/22015 Cathepsin L (3.4.22.15)
C12Y 304/22016 Cathepsin H (3.4.22.16)
C12Y 304/22017 Calpain (3.4.22.17) (C12Y304/22052, C12Y304/22053 take precedence)
C12Y 304/22024 Cathepsin T (3.4.22.24)
C12Y 304/22025 Glycyl endopeptidase (3.4.22.25)
C12Y 304/22026 Cancer procoagulant (3.4.22.26)
C12Y 304/22027 Cathepsin S (3.4.22.27)
C12Y 304/22028 Picornain 3C (3.4.22.28)
C12Y 304/22029 Picornain 2A (3.4.22.29)
C12Y 304/2203 Caricain (3.4.22.30)
C12Y 304/22031 Ananain (3.4.22.31)

Top Applicants

Top 10 applicants by patent filingsfor class C12, 2013–2023, worldwide · Source: EPO PATSTAT

HARVARD UNIVERSITY US 8,321
CHINESE ACADEMY OF SCIENCES 7,486
UNIVERSITY OF CALIFORNIA US 7,320
REGENERON PHARMACEUTICALS US 5,003
INSERM (INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE) FR 4,292
UNIVERSITY OF PENNSYLVANIA US 4,213
CNRS (CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE) FR 4,113
JIANGNAN UNIVERSITY 3,961
ROCHE CH 3,792
ILLUMINA US 3,692