Function or property of the active ingredients

Introduced: January 1995

Last revised: January 2006

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 103/00 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

13 direct subcodes

Child Classifications

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C04B 103/1 Accelerators
C04B 103/2 Retarders
C04B 103/3 Water reducers, plasticisers, air-entrainers
C04B 103/4 Surface-active agents; Dispersants
C04B 103/42 Pore formers
C04B 103/44 Thickening, gelling or viscosity increasing agents
C04B 103/46 Water-loss reducers, hygroscopic or hydrophilic agents
C04B 103/48 Foam stabilisers
C04B 103/5 Defoamers; Air detrainers
C04B 103/52 Grinding aids
C04B 103/54 Pigments; Dyes
C04B 103/56 Opacifiers
C04B 103/6 Agents for protection against chemical, physical or biological attack

Top Applicants

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

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