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CPC Main Group
C01D 9/00

Nitrates of sodium, potassium or alkali metals in general

Filing statistics

CPC C01D 9/00 belongs to the parent subclass C01D, which recorded 16,039 patent applications worldwide between 2013 and 2023. Annual filings grew from 688 in 2013 to 2,190 in 2023 (+218%). The most active applicants in class C01 are CHINESE ACADEMY OF SCIENCES (4,293 applications), LG CHEM (3,317 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (2,219 applications).

Source: EPO PATSTAT, worldwide filings

7 direct subcodes

Child Classifications

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  • C01D 9/02 Preparation by working-up natural salt mixtures
  • C01D 9/04 Preparation with liquid nitric acid
  • C01D 9/06 Preparation with gaseous nitric acid or nitrogen oxides
  • C01D 9/16 Purification
  • C01D 9/18 Preparation in the form of shaped products, e.g. granules
  • C01D 9/20 Preventing the absorption of moisture or caking

Top Applicants

Top 10 applicants by patent filingsfor class C01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 4,293
  2. LG CHEM KR 3,317
  3. BASF (BADISCHE ANILIN & SODA FABRIK) DE 2,219
  4. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,154
  5. OMYA INTERNATIONAL CH 1,524
  6. PANASONIC INTELLECTUAL PROPERTY JP 1,362
  7. SAUDI ARABIAN OIL COMPANY SA 1,298
  8. SUMITOMO METAL MINING COMPANY JP 1,286
  9. CENTRAL SOUTH UNIVERSITY 1,243
  10. L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,238