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IPC Subgroup
C04B 35/01

based on oxides

Introduced: January 1995

Last revised: January 2006

Full Title

Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products > based on oxides

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
Subclass:
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE

Filing statistics

IPC C04B 35/01 belongs to the parent subclass C04B, which recorded 267,018 patent applications worldwide between 2013 and 2023. Annual filings grew from 18,185 in 2013 to 23,514 in 2023 (+29%), peaking at 27,426 applications in 2018. The most active applicants in class C04 are CHINESE ACADEMY OF SCIENCES (2,095 applications), WUHAN UNIVERSITY OF TECHNOLOGY (1,205 applications) and NGK INSULATORS (1,133 applications).

Source: EPO PATSTAT, worldwide filings

15 direct subcodes

Child Classifications

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  • C04B 35/08 based on beryllium oxide
  • C04B 35/12 based on chromium oxide
  • C04B 35/14 based on silica
  • C04B 35/42 based on chromites
  • C04B 35/447 based on phosphates
  • C04B 35/45 based on copper oxide or solid solutions thereof with other oxides

Top Applicants

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

  1. CHINESE ACADEMY OF SCIENCES 2,095
  2. WUHAN UNIVERSITY OF TECHNOLOGY 1,205
  3. NGK INSULATORS JP 1,133
  4. HALLIBURTON ENERGY SERVICES GROUP US 1,049
  5. SIKA TECHNOLOGY CH 1,041
  6. GUILIN UNIVERSITY OF TECHNOLOGY 807
  7. WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY 806
  8. SOUTHEAST UNIVERSITY 801
  9. CORNING US 777
  10. UNITED STATES GYPSUM COMPANY US 739