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IPC Subgroup
B28B 21/34

combined with vibrating or other additional compacting means

Introduced: September 1968

Last revised: January 2006

Full Title

Methods or machines specially adapted for the production of tubular articles > by casting into moulds > using compacting means > using rotatable mould or core parts > Centrifugal moulding > combined with vibrating or other additional compacting means

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

Related Keywords

using VIBRATIONS for moulding clay or other ceramic compositions or cementitious material 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