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IPC Subgroup
C01C 1/02

Preparation or separation of ammonia

Introduced: September 1968

Last revised: January 2006

Full Title

Ammonia; Compounds thereof > Preparation or separation of ammonia

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
INORGANIC CHEMISTRY
Subclass:
AMMONIA; CYANOGEN; COMPOUNDS THEREOF

4 direct subcodes

Child Classifications

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  • C01C 1/04 Preparation of ammonia by synthesis
  • C01C 1/08 Preparation of ammonia from nitrogenous organic substances
  • C01C 1/1 Separation of ammonia from ammonia liquors, e.g. gas liquors

Top Applicants

Top 10 applicants by patent filingsfor class C01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 5,794
  2. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,286
  3. LG CHEM KR 2,689
  4. BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,669
  5. CENTRAL SOUTH UNIVERSITY 1,531
  6. KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 1,252
  7. SUMITOMO METAL MINING COMPANY JP 1,073
  8. ZHEJIANG UNIVERSITY 1,061
  9. PANASONIC INTELLECTUAL PROPERTY JP 1,058
  10. PANASONIC INTELLECTUAL PROPERTY 1,038