CPC Subgroup
C12Y 502/01 Cis-trans-Isomerases (5.2.1)
Full Title
Cis-trans-isomerases (5.2) > Cis-trans-Isomerases (5.2.1)
Filing statistics
CPC C12Y 502/01 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
12 direct subcodes
Child Classifications
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- C12Y 502/01001 Maleate isomerase (5.2.1.1)
- C12Y 502/01002 Maleylacetoacetate isomerase (5.2.1.2)
- C12Y 502/01003 Retinal isomerase (5.2.1.3) (C12Y101/013, C12Y101/01315, C12Y203/01135, C12Y301/01064 take precedence)
- C12Y 502/01004 Maleylpyruvate isomerase (5.2.1.4)
- C12Y 502/01005 Linoleate isomerase (5.2.1.5)
- C12Y 502/01006 Furylfuramide isomerase (5.2.1.6)
- C12Y 502/01008 Peptidylprolyl isomerase (5.2.1.8), i.e. cyclophilin
- C12Y 502/01009 Farnesol 2-isomerase (5.2.1.9)
- C12Y 502/0101 2-Chloro-4-carboxymethylenebut-2-en-1,4-olide isomerase (5.2.1.10)
- C12Y 502/01012 Zeta-carotene isomerase (5.2.1.12)
- C12Y 502/01013 Prolycopene isomerase (5.2.1.13)
- C12Y 502/01014 Beta-carotene isomerase (5.2.1.14)
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