CPC Main Group
B01D 69/00 Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
7 direct subcodes
Child Classifications
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- B01D 69/02 characterised by their properties
- B01D 69/04 Tubular membranes
- B01D 69/06 Flat membranes
- B01D 69/08 Hollow fibre membranes (manufacture of hollow fibres D01D5/24, D01F1/08)
- B01D 69/10 Supported membranes; Membrane supports
- B01D 69/12 Composite membranes; Ultra-thin membranes
- B01D 69/14 Dynamic membranes
Top Applicants
Top 10 applicants by patent filingsfor class B01, 2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 10,345
- CHINESE ACADEMY OF SCIENCES 8,352
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,134
- LG CHEM KR 4,290
- SAUDI ARABIAN OIL COMPANY SA 3,444
- IFPEN (IFP ENERGIES NOUVELLES) FR 3,417
- DOW GLOBAL TECHNOLOGIES US 3,195
- MANN + HUMMEL DE 2,822
- JOHNSON MATTHEY GB 2,802
- UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 2,737