IPC Main Group
B01D 21/00 Separation of suspended solid particles from liquids by sedimentation
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- Subclass:
- SEPARATION
Additional Content
Devices for separating or removing fatty or oily substances or similar floating material from water, waste water, or sewage
Related Keywords
FLOCCULATIONPRECIPITATION of particles in liquidsSEDIMENTATIONsettling TANKS
7 direct subcodes
Child Classifications
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- B01D 21/01 using flocculating agents
- B01D 21/02 Settling tanks
- B01D 21/18 Construction of the scrapers or the driving mechanisms for settling tanks
- B01D 21/24 Feed or discharge mechanisms for settling tanks
- B01D 21/26 Separation of sediment aided by centrifugal force
- B01D 21/28 Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
- B01D 21/3 Control equipment
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