Halides of sodium, potassium, or alkali metals in general

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: INORGANIC CHEMISTRY
Subclass:: COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM

Filing statistics

IPC C01D 3/00 belongs to the parent subclass C01D, which recorded 19,597 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,092 in 2013 to 2,774 in 2023 (+154%). 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

7 direct subcodes

Child Classifications

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C01D 3/02 Fluorides
C01D 3/04 Chlorides
C01D 3/1 Bromides
C01D 3/12 Iodides
C01D 3/14 Purification
C01D 3/22 Preparation in the form of granules, pieces, or other shaped products
C01D 3/26 Preventing the absorption of moisture or caking of the crystals

Top Applicants

Top 10 applicants by patent filingsfor 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