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IPC Subclass
C01C

AMMONIA; CYANOGEN; COMPOUNDS THEREOF

Introduced: September 1968

Classification Context

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

Description

C01C covers the production, purification, and chemical compounds of ammonia and cyanogen, along with their derivatives. This includes synthetic ammonia manufacture, ammonia recovery processes, and the preparation of cyanides, isocyanides, and related nitrogen-containing compounds. The subclass encompasses both industrial synthesis methods and laboratory-scale preparation techniques for ammonia and cyanogen-based products used in fertilizers, chemicals, and pharmaceutical synthesis.

Filing statistics

IPC subclass C01C recorded 13,640 patent applications worldwide between 2013 and 2023. Annual filings grew from 947 in 2013 to 1,854 in 2023 (+96%). The most active applicants in class C01 are CHINESE ACADEMY OF SCIENCES (5,794 applications), SINOPEC (CHINA PETROCHEMICAL CORPORATION) (3,286 applications) and LG CHEM (2,689 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Glossary

Direct bonding Requires a bond between two adjacent atoms. Inorganic compound inorganic compounds A compound devoid of a carbon atom and containing a non-metallic element or a compound containing a carbon atom, and satisfying one of the following criteria: the compound cannot have a carbon atom having direct bonding to another carbon atom; or the compound cannot have direct bonding between a carbon atom and a halogen or hydrogen atom; or the compound cannot have direct bonding between a carbon atom and a nitrogen atom by a single or double bond. The following are exceptions to the above and are to be considered as inorganic compounds: compounds consisting of only carbon atoms, (e.g. fullerenes), cyanogen, cyanogen halides, cyanamide, phosgene, thiophosgene, hydrocyanic acid, isocyanic acid, isothiocyanic acid, fulminic acid, unsubstituted carbamic acid, and salts of the previously mentioned acids and which contain the same limitations as to a carbon atom. Moiety A specific part of a molecule. Preparation Preparations Covers synthesis, purification, separation, stabilisation or use of additives, unless a separate place is provided in the classification scheme.

Limiting references

Salts of the oxyacids of halogens Peroxides, salts of peroxyacids Thiosulfates, dithionites, polythionates Compounds containing selenium or tellurium Azides Metal amides Ammonium salts of carbamic acid Nitrites Phosphides Salts of the oxyacids of phosphorus Ammonium phosphates Compounds containing silicon Compounds containing boron Preparing inorganic compounds except carbon dioxide using enzymes or fermentation processes Electrolytic production of inorganic compounds or non-metals Processes of producing compounds in which electricity is simultaneously produced Electrophoretic production of inorganic compounds or non-metals

Application references

Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products

Related Keywords

inorganic compounds of ACTINIDESother inorganic compounds of ALKALI METALSother inorganic compounds of ALKALINE EARTH METALSother inorganic compounds of ALUMINIUMammonium saltsother inorganic compounds of BARIUMother inorganic compounds of BERYLLIUMinorganic compounds of BISMUTHinorganic compounds of CADMIUMother inorganic compounds of CAESIUMother inorganic compounds of CALCIUMinorganic CARBONATESinorganic compounds of CHROMIUMinorganic compounds of COBALTinorganic compounds of COLUMBIUMinorganic compounds of COPPERinorganic compounds of FRANCIUMinorganic compounds of GALLIUMinorganic compounds of GERMANIUMinorganic compounds of GOLDinorganic compounds of HAFNIUMinorganic compounds of INDIUMinorganic compounds of IRIDIUMinorganic compounds of IRONother inorganic compounds of LANTHANIDESinorganic compounds of LEAD(S)other inorganic compounds of MAGNESIUMinorganic compounds of MANGANESEinorganic compounds of MERCURYinorganic compounds of MOLYBDENUMinorganic compounds of NICKELinorganic compounds of NIOBIUMother inorganic compounds of NITROGENinorganic compounds of OSMIUMinorganic compounds of PALLADIUMinorganic compounds of PLATINUMinorganic compounds of POLONIUMother inorganic compounds of POTASSIUMinorganic compounds of PROTACTINIUMother inorganic compounds of RADIUMinorganic compounds of RHENIUMinorganic compounds of RHODIUMother inorganic compounds of RUBIDIUMinorganic compounds of RUTHENIUMinorganic compounds of SILVERother inorganic compounds of SODIUMother inorganic compounds of STRONTIUMinorganic SULFATESinorganic compounds of TANTALUMinorganic compounds of THALLIUMother inorganic compounds of THORIUMinorganic compounds of TINinorganic compounds of TITANIUMinorganic compounds of TRANSURANICinorganic compounds of TUNGSTENinorganic compounds of URANIUMinorganic compounds of VANADIUMinorganic compounds of ZINCinorganic compounds of ZIRCONIUM

2 direct subcodes

Child Classifications

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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