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IPC Subgroup
B28B 11/22

for cleaning

Introduced: September 1968

Last revised: January 2006

Full Title

Apparatus or processes for treating or working the shaped articles > for cleaning

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
WORKING CEMENT, CLAY, OR STONE
Subclass:
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER

Filing statistics

IPC B28B 11/22 belongs to the parent subclass B28B, which recorded 124,681 patent applications worldwide between 2013 and 2023. Annual filings grew from 4,345 in 2013 to 15,254 in 2023 (+251%), peaking at 18,524 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

CLEANING articles moulded from clay or other ceramic compositions or cementitious material after moulding

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