CPC Main Group Additional Only
B01D 2323/00 Details relating to membrane preparation
33 direct subcodes
Child Classifications
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- B01D 2323/02 Hydrophilization
- B01D 2323/04 Hydrophobization
- B01D 2323/06 Specific viscosities of materials involved
- B01D 2323/08 Specific temperatures applied
- B01D 2323/10 Specific pressure applied
- B01D 2323/12 Specific ratios of components used
- B01D 2323/14 Ageing features
- B01D 2323/15 Use of additives
- B01D 2323/219 Specific solvent system
- B01D 2323/24 Use of template or surface directing agents [SDA]
- B01D 2323/26 Spraying processes
- B01D 2323/28 Pore treatments
- B01D 2323/30 Cross-linking
- B01D 2323/32 Use of chain transfer agents or inhibitors
- B01D 2323/34 Use of radiation
- B01D 2323/35 Use of magnetic or electrical fields
- B01D 2323/36 Introduction of specific chemical groups
- B01D 2323/38 Graft polymerization
- B01D 2323/39 Electrospinning
- B01D 2323/40 in-situ membrane formation
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