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PCE
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CPC Subgroup Additional Only
A61L 2209/21

Use of chemical compounds for treating air or the like

Full Title

Aspects relating to disinfection, sterilisation or deodorisation of air > Method-related aspects > Use of chemical compounds for treating air or the like

3 direct subcodes

Child Classifications

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  • A61L 2209/211 Use of hydrogen peroxide, liquid and vaporous
  • A61L 2209/212 Use of ozone, e.g. generated by UV radiation or electrical discharge
  • A61L 2209/213 Use of electrochemically treated water, e.g. electrolysed water or water treated by electrical discharge

Top Applicants

Top 10 applicants by patent filingsfor class A61, 2013–2023, worldwide · Source: EPO PATSTAT

  1. PHILIPS ELECTRONICS NL 20,621
  2. NOVARTIS CH 15,792
  3. ROCHE CH 14,303
  4. COVIDIEN US 13,862
  5. HARVARD UNIVERSITY US 13,454
  6. UNIVERSITY OF CALIFORNIA US 12,798
  7. P&G (PROCTER & GAMBLE COMPANY) US 12,140
  8. L'OREAL FR 11,800
  9. OLYMPUS CORPORATION JP 9,894
  10. BOSTON SCIENTIFIC SCIMED US 9,513