DIFF Subgroup
C30B 29/22 Complex oxides
Introduced: January 1980
Full Title
Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape > Inorganic compounds or compositions > Oxides > Complex oxides
Of 6 combined children, 5 exist in both systems.
1 codes are CPC-only extensions.
3 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
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- C30B 29/24 with formula AMeO3, wherein A is a rare earth metal and Me is Fe, Ga, Sc, Cr, Co or Al, e.g. ortho ferrites since 1980 IPC+CPC Available in IPC and CPC
- C30B 29/26 with formula BMe2O4, wherein B is Mg, Ni, Co, Al, Zn, or Cd and Me is Fe, Ga, Sc, Cr, Co, or Al since 1980 IPC+CPC Available in IPC and CPC
- C30B 29/28 with formula A3Me5O12 wherein A is a rare earth metal and Me is Fe, Ga, Sc, Cr, Co or Al, e.g. garnets since 1980 IPC+CPC Available in IPC and CPC
- C30B 29/32 Titanates; Germanates; Molybdates; Tungstates since 1980 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C30,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 1,516
- SUMCO CORPORATION JP 786
- SUMCO CORPORATION 703
- SUMITOMO ELECTRIC INDUSTRIES JP 604
- SHIN ETSU HANDOTAI COMPANY JP 556
- GLOBALWAFERS COMPANY TW 492
- APPLIED MATERIALS US 463
- SHIN ETSU HANDOTAI COMPANY 450
- SUMITOMO ELECTRIC INDUSTRIES 436
- SILTRONIC DE 429
Top Applicants (CPC)
Class C30,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 1,052
- SUMCO CORPORATION JP 881
- APPLIED MATERIALS US 871
- SUMITOMO ELECTRIC INDUSTRIES JP 682
- SHIN ETSU HANDOTAI COMPANY JP 649
- SHIN-ETSU CHEMICAL COMPANY JP 506
- SUMCO CORPORATION 500
- SILTRONIC DE 491
- GLOBALWAFERS COMPANY TW 458
- NGK INSULATORS JP 379