Separating dispersed particles from gases, air or vapours by liquid as separating agent

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: PERFORMING OPERATIONS; TRANSPORTING
Class:: PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Subclass:: SEPARATION

Filing statistics

IPC B01D 47/00 belongs to the parent subclass B01D, which recorded 1,309,454 patent applications worldwide between 2013 and 2023. Annual filings grew from 46,604 in 2013 to 187,276 in 2023 (+302%), peaking at 197,396 applications in 2020. The most active applicants in class B01 are SINOPEC (CHINA PETROCHEMICAL CORPORATION) (16,893 applications), CHINESE ACADEMY OF SCIENCES (11,733 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (3,898 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

scrubbing GAS(ES)washing GAS(ES)gas SCRUBBERSSCRUBBING of gasesWASHING of gases

8 direct subcodes

Child Classifications

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B01D 47/02 by passing the gas or air or vapour over or through a liquid bath
B01D 47/04 by passing the gas or air or vapour through foam
B01D 47/05 by condensation of the separating agent
B01D 47/06 Spray cleaning
B01D 47/1 Venturi scrubbers
B01D 47/12 Washers with plural different washing sections
B01D 47/14 Packed scrubbers
B01D 47/16 Apparatus having rotary means, other than rotatable nozzles, for atomising the cleaning liquid

Top Applicants

Top 10 applicants by patent filingsfor class B01, 2013–2023, worldwide · Source: EPO PATSTAT

SINOPEC (CHINA PETROCHEMICAL CORPORATION) 16,893
CHINESE ACADEMY OF SCIENCES 11,733
BASF (BADISCHE ANILIN & SODA FABRIK) DE 3,898
LG CHEM KR 3,367
PETROCHINA COMPANY 3,224
IFPEN (IFP ENERGIES NOUVELLES) FR 3,042
ZHEJIANG UNIVERSITY 2,890
MANN + HUMMEL DE 2,740
JOHNSON MATTHEY GB 2,534
SAUDI ARABIAN OIL COMPANY SA 2,527