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DIFF Subgroup
B28B 1/20

by centrifugal or rotational casting (slip-casting involving rotation of the mould B28B1/28; for molten material B28B1/54)

Introduced: September 1968

Title

Titles differ between systems:

IPC: by centrifugal or rotational casting

CPC: by centrifugal or rotational casting (slip-casting involving rotation of the mould B28B1/28; for molten material B28B1/54)

Full Title

Full titles differ between systems:

IPC:

Producing shaped articles from the material > by centrifugal or rotational casting

CPC:

Producing shaped articles from the material (using presses B28B3/00; shaping on moving conveyors B28B5/00; producing tubular articles B28B21/00 ) > by centrifugal or rotational casting (slip-casting involving rotation of the mould B28B1/28; for molten material B28B1/54)

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

Class B28,2013–2023, worldwide · Source: EPO PATSTAT

  1. DISCO CORPORATION JP 1,471
  2. HILTI LI 575
  3. CORNING US 544
  4. MITSUBOSHI DIAMOND INDUSTRIAL COMPANY JP 518
  5. UNITED STATES GYPSUM COMPANY US 485
  6. DISCO ABRASIVE SYSTEM 459
  7. GE (GENERAL ELECTRIC COMPANY) US 454
  8. MITSUBOSHI DIAMOND INDUSTRIAL COMPANY 439
  9. DISCO CORPORATION 403
  10. NGK INSULATORS JP 308