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CPC Subclass Not Allocatable
C04B

LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE ; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

Description

C04B covers the manufacture, composition, and properties of inorganic binding materials and their derivatives, including lime, magnesia, and cementitious materials (Portland cement, slag cements, etc.), as well as their composite applications in mortars, concrete, and other building materials. The class encompasses artificial stone production, ceramic materials and manufacturing processes, and refractory compositions designed for high-temperature applications. Also included are methods and materials for treating, processing, or modifying natural stone products for construction or industrial use.

28 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