Compounds containing nitrogen and non-metals (C01B21/06, C01B21/08 take precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: Compounds containing nitrogen and non-metals

CPC: Compounds containing nitrogen and non-metals (C01B21/06, C01B21/08 take precedence)

Full titles differ between systems:

IPC:

Nitrogen; Compounds thereof > Compounds containing nitrogen and non-metals

CPC:

Nitrogen; Compounds thereof > Compounds containing nitrogen and non-metals (C01B21/06, C01B21/08 take precedence)

Of 9 combined children, 7 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

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C01B 21/0821 +3 CPC CPC only CPC only
C01B 21/0828 CPC only CPC only
C01B 21/083 containing one or more halogen atoms since 1980 +1 CPC IPC+CPC Available in IPC and CPC
C01B 21/086 containing one or more sulfur atoms since 1980 +1 CPC IPC+CPC Available in IPC and CPC
C01B 21/087 containing one or more hydrogen atoms since 1980 IPC+CPC Available in IPC and CPC
C01B 21/097 containing phosphorus atoms since 1980 +1 CPC IPC+CPC Available in IPC and CPC
C01B 21/12 Carbamic acid ; Salts thereof +1 CPC IPC+CPC Available in IPC and CPC
C01B 21/14 Hydroxylamine; Salts thereof +5 CPC IPC+CPC Available in IPC and CPC
C01B 21/16 Hydrazine; Salts thereof IPC+CPC Available in IPC and CPC

Class C01,2013–2023, worldwide · Source: EPO PATSTAT

Class C01,2013–2023, worldwide · Source: EPO PATSTAT

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SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,154
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SAUDI ARABIAN OIL COMPANY SA 1,298
SUMITOMO METAL MINING COMPANY JP 1,286
CENTRAL SOUTH UNIVERSITY 1,243
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,238