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CPC Subgroup
B28B 1/20

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

Full Title

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)

Filing statistics

CPC B28B 1/20 belongs to the parent subclass B28B, which recorded 57,301 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,365 in 2013 to 5,105 in 2023 (+116%), peaking at 7,697 applications in 2020. The most active applicants in class B28 are DISCO CORPORATION (1,471 applications), HILTI (575 applications) and CORNING (544 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

Top 10 applicants by patent filingsfor 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