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CPC Subgroup
C09K 8/52

Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning

Full Title

Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations > Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning

3 direct subcodes

Child Classifications

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  • C09K 8/524 organic depositions, e.g. paraffins or asphaltenes
  • C09K 8/536 characterised by their form or by the form of their components, e.g. encapsulated material

Top Applicants

Top 10 applicants by patent filingsfor class C09, 2013–2023, worldwide · Source: EPO PATSTAT

  1. LG CHEM KR 7,954
  2. HALLIBURTON ENERGY SERVICES GROUP US 6,584
  3. NITTO DENKO CORPORATION JP 6,500
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
  5. DOW GLOBAL TECHNOLOGIES US 6,324
  6. FUJIFILM JP 5,832
  7. MERCK PATENT DE 5,481
  8. BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
  9. SAMSUNG DISPLAY KR 5,105
  10. NITTO DENKO CORPORATION 3,584