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IPC Main Group
B28C 5/00

Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
WORKING CEMENT, CLAY, OR STONE
Subclass:
PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER

Filing statistics

IPC B28C 5/00 belongs to the parent subclass B28C, which recorded 73,670 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,713 in 2013 to 10,858 in 2023 (+534%), peaking at 12,054 applications in 2020. The most active applicants in class B28 are MITSUBOSHI DIAMOND INDUSTRIAL COMPANY (868 applications), QINGDAO GAOCE TECHNOLOGY COMPANY (678 applications) and DISCO CORPORATION (500 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

mixers for CEMENT(S)CONCRETE mixers

8 direct subcodes

Child Classifications

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  • B28C 5/38 wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means
  • B28C 5/4 Mixing specially adapted for preparing mixtures containing fibres
  • B28C 5/42 Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
  • B28C 5/44 Apparatus specially adapted for drive by muscle power
  • B28C 5/46 Arrangements for applying super- or sub-atmospheric pressure during mixing; Arrangements for cooling or heating during mixing
  • B28C 5/48 wherein the mixing is effected by vibrations

Top Applicants

Top 10 applicants by patent filingsfor class B28, 2013–2023, worldwide · Source: EPO PATSTAT

  1. MITSUBOSHI DIAMOND INDUSTRIAL COMPANY 868
  2. QINGDAO GAOCE TECHNOLOGY COMPANY 678
  3. DISCO CORPORATION JP 500
  4. ZHOU ZHAODI 500
  5. MITSUBOSHI DIAMOND INDUSTRIAL COMPANY JP 456
  6. HILTI LI 455
  7. CORNING US 407
  8. UNITED STATES GYPSUM COMPANY US 375
  9. ZHENGZHOU YUAN DONG REFRACTORIES COMPANY 370
  10. HUNAN SANY KUAIERJU RESIDENTIAL INDUSTRY COMPANY 351