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IPC Subgroup
C04B 24/16

Sulfur-containing compounds

Introduced: January 1985

Last revised: January 2006

Full Title

Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers > Sulfur-containing compounds

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

2 direct subcodes

Child Classifications

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  • C04B 24/18 Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye

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