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CPC Subgroup
C04B 41/47

Oils, fats or waxes

Full Title

After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone (conditioning of the materials prior to shaping C04B40/00; applying liquids or other fluent materials to surfaces, in general B05; grinding or polishing B24; apparatus or processes for treating or working shaped articles of clay or other ceramic compositions, slag or mixtures containing cementitious material B28B11/00; working stone or stone-like materials B28D; glazes, other than cold glazes, C03C8/00; etching, surface-brightening or pickling compositions C09K13/00) > Coating or impregnating (paints C09D), > with organic materials > Oils, fats or waxes

3 direct subcodes

Child Classifications

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Top Applicants

Top 10 applicants by patent filingsfor class C04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. HALLIBURTON ENERGY SERVICES GROUP US 2,158
  2. CHINESE ACADEMY OF SCIENCES 1,569
  3. NGK INSULATORS JP 1,504
  4. SIKA TECHNOLOGY CH 1,181
  5. CORNING US 974
  6. WUHAN UNIVERSITY OF TECHNOLOGY 926
  7. UNITED STATES GYPSUM COMPANY US 882
  8. GE (GENERAL ELECTRIC COMPANY) US 828
  9. MITSUBISHI MATERIALS CORPORATION JP 792
  10. SAUDI ARABIAN OIL COMPANY SA 686