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CPC Main Group Additional Only
C12Q 2334/00

O-linked chromogens for determinations of hydrolase enzymes, e.g. glycosidases, phosphatases, esterases

Filing statistics

CPC C12Q 2334/00 belongs to the parent subclass C12Q, which recorded 272,350 patent applications worldwide between 2013 and 2023. Annual filings grew from 18,205 in 2013 to 23,458 in 2023 (+29%), peaking at 28,974 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

6 direct subcodes

Child Classifications

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  • C12Q 2334/10 p-Nitrophenol derivatives
  • C12Q 2334/30 Naphthol derivatives, e.g. alpha-naphthyl-esters, i.e. alpha-NE, beta-naphthyl-esters, i.e. beta-NE
  • C12Q 2334/40 Triphenylmethane dye chromogens, e.g. fluorescein derivatives
  • C12Q 2334/70 the product, e.g. phenol, naphthol being diazotised in situ, e.g. with Fast Red

Top Applicants

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

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