IPC Main Group
C04B 38/00 Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
Introduced: January 1985
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
Additional Content
Artificial stone compositions containing fibres, and voids which may occur between the intertwined fibres, but no binders
Related Keywords
CELLULAR materials based on mortars, concrete, artificial stone or ceramic wareporous mortars, concrete, artificial stone or ceramic ware
5 direct subcodes
Child Classifications
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- C04B 38/02 by adding chemical blowing agents
- C04B 38/04 by dissolving-out added substances
- C04B 38/06 by burning-out added substances
- C04B 38/08 by adding porous substances
- C04B 38/1 by using foaming agents
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