DIFF Subgroup
C01C 1/02 Preparation, or separation of ammonia
Introduced: September 1968
Title
Titles differ between systems:
IPC: Preparation or separation of ammonia
CPC: Preparation, or separation of ammonia
Full Title
Full titles differ between systems:
IPC:
Ammonia; Compounds thereof > Preparation or separation of ammonia
CPC:
Ammonia; Compounds thereof > Preparation, or separation of ammonia
Of 7 combined children, 4 exist in both systems.
3 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C01C 1/04 Preparation of ammonia by synthesis (preparation or purification of gas mixtures for ammonia synthesis C01B3/025) +2 CPC IPC+CPC Available in IPC and CPC
- C01C 1/08 Preparation of ammonia from nitrogenous organic substances +2 CPC IPC+CPC Available in IPC and CPC
- C01C 1/10 Separation of ammonia from ammonia liquors, e.g. gas liquors IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C01,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 5,794
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,286
- LG CHEM KR 2,689
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,669
- CENTRAL SOUTH UNIVERSITY 1,531
- KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 1,252
- SUMITOMO METAL MINING COMPANY JP 1,073
- ZHEJIANG UNIVERSITY 1,061
- PANASONIC INTELLECTUAL PROPERTY JP 1,058
- PANASONIC INTELLECTUAL PROPERTY 1,038
Top Applicants (CPC)
Class C01,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 4,293
- LG CHEM KR 3,317
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 2,219
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,154
- OMYA INTERNATIONAL CH 1,524
- PANASONIC INTELLECTUAL PROPERTY JP 1,362
- 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