B28B 7/34 Moulds, cores, or mandrels of special material, e.g. destructible materials (for slip casting B28B1/26)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Moulds, cores, or mandrels of special material, e.g. destructible materials
CPC: Moulds, cores, or mandrels of special material, e.g. destructible materials (for slip casting B28B1/26)
Full Title
Full titles differ between systems:
Moulds; Cores; Mandrels > Moulds, cores, or mandrels of special material, e.g. destructible materials
Moulds; Cores; Mandrels (specially adapted for the production of the tubular articles B28B21/00; ) > Moulds, cores, or mandrels of special material, e.g. destructible materials (for slip casting B28B1/26)
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Child Classifications
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Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
Class B28,2013–2023, worldwide · Source: EPO PATSTAT
- DISCO CORPORATION JP 1,471
- HILTI LI 575
- CORNING US 544
- MITSUBOSHI DIAMOND INDUSTRIAL COMPANY JP 518
- UNITED STATES GYPSUM COMPANY US 485
- DISCO ABRASIVE SYSTEM 459
- GE (GENERAL ELECTRIC COMPANY) US 454
- MITSUBOSHI DIAMOND INDUSTRIAL COMPANY 439
- DISCO CORPORATION 403
- NGK INSULATORS JP 308