SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER

Introduced: September 1968

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

Description

B28B covers machinery and processes for forming clay, ceramic compositions, slag, and cementitious mixtures (such as plaster, concrete, and cement) into finished shapes. This subclass encompasses extrusion, pressing, casting, molding, and other shaping techniques applied to these materials before they are fired, set, or hardened. Typical applications include brick and tile manufacturing, pottery production, precast concrete elements, and plaster products. The classification specifically addresses the mechanical shaping stage and does not extend to firing processes, which are classified elsewhere in the ceramic and cement technology sections.

Related Keywords

moulding ARTIFICIAL stonesBATTING claymoulding BRICKSCASTING of articles from clay or other ceramic compositions or cementitious materialmoulding cementitious materialworking CERAMIC(S) compositionsmoulding CHAMOTTEmoulding CHINA waremoulding CLAY(S)moulding EARTHENWAREcasting GYPSUMMOULDING(S) clay or other ceramic compositions or cementitious materialmoulding POTTERYSHAPING of clay or other ceramic compositions or cementitious materialWORKING clay, ceramic compositions or cement mixturesWORKING plaster

11 direct subcodes

Child Classifications

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B28B 1/00 Producing shaped articles from the material
B28B 11/00 Apparatus or processes for treating or working the shaped articles
B28B 13/00 Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
B28B 15/00 General arrangement or layout of plant
B28B 17/00 Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
B28B 19/00 Machines or methods for applying the material to surfaces to form a permanent layer thereon
B28B 21/00 Methods or machines specially adapted for the production of tubular articles
B28B 23/00 Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material
B28B 3/00 Producing shaped articles from the material by using presses; Presses specially adapted therefor
B28B 5/00 Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping
B28B 7/00 Moulds; Cores; Mandrels

Top Applicants

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

MITSUBOSHI DIAMOND INDUSTRIAL COMPANY 868
QINGDAO GAOCE TECHNOLOGY COMPANY 678
DISCO CORPORATION JP 500
ZHOU ZHAODI 500
MITSUBOSHI DIAMOND INDUSTRIAL COMPANY JP 456
HILTI LI 455
CORNING US 407
UNITED STATES GYPSUM COMPANY US 375
ZHENGZHOU YUAN DONG REFRACTORIES COMPANY 370
HUNAN SANY KUAIERJU RESIDENTIAL INDUSTRY COMPANY 351