CPC Main Group
B01D 61/00 Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor (separation of gases or vapours by diffusion B01D53/22)
9 direct subcodes
Child Classifications
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- B01D 61/02 Reverse osmosis; Hyperfiltration
- B01D 61/14 Ultrafiltration; Microfiltration
- B01D 61/24 Dialysis
- B01D 61/36 Pervaporation; Membrane distillation; Liquid permeation
- B01D 61/38 Liquid-membrane separation
- B01D 61/42 Electrodialysis; Electro-osmosis
- B01D 61/58 Multistep processes
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