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DIFF Subgroup
C30B 13/20

by induction, e.g. hot wire technique (C30B13/18 takes precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: by induction, e.g. hot wire technique

CPC: by induction, e.g. hot wire technique (C30B13/18 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Single-crystal growth by zone-melting; Refining by zone-melting > Heating of the molten zone > by induction, e.g. hot wire technique

CPC:

Single-crystal growth by zone-melting; Refining by zone-melting (C30B17/00 takes precedence; by changing the cross-section of the treated solid C30B15/00; under a protective fluid C30B27/00; for the growth of homogeneous polycrystalline material with defined structure C30B28/00) > Heating of the molten zone > by induction, e.g. hot wire technique (C30B13/18 takes precedence)

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

Top Applicants

Top Applicants (IPC)

Class C30,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 1,516
  2. SUMCO CORPORATION JP 786
  3. SUMCO CORPORATION 703
  4. SUMITOMO ELECTRIC INDUSTRIES JP 604
  5. SHIN ETSU HANDOTAI COMPANY JP 556
  6. GLOBALWAFERS COMPANY TW 492
  7. APPLIED MATERIALS US 463
  8. SHIN ETSU HANDOTAI COMPANY 450
  9. SUMITOMO ELECTRIC INDUSTRIES 436
  10. SILTRONIC DE 429

Top Applicants (CPC)

Class C30,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 1,052
  2. SUMCO CORPORATION JP 881
  3. APPLIED MATERIALS US 871
  4. SUMITOMO ELECTRIC INDUSTRIES JP 682
  5. SHIN ETSU HANDOTAI COMPANY JP 649
  6. SHIN-ETSU CHEMICAL COMPANY JP 506
  7. SUMCO CORPORATION 500
  8. SILTRONIC DE 491
  9. GLOBALWAFERS COMPANY TW 458
  10. NGK INSULATORS JP 379