Purification of biological particles
US-2026028597-A1 · Jan 29, 2026 · US
pH gradient or chromatofocusing, i.e. separation according to the isoelectric point pI
pH gradient or chromatofocusing, i.e. separation according to the isoelectric point pI · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D15/168 |
| Official title | {pH gradient or chromatofocusing, i.e. separation according to the isoelectric point pI} |
| Display label | pH gradient or chromatofocusing, i.e. separation according to the isoelectric point pI |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 6 |
| 2018 | 4 |
| 2019 | 6 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 1 |
| 2023 | 7 |
| 2024 | 1 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vitro prediction of in vivo half-life
US-12461109-B2 · Nov 4, 2025 · US
Chromatographic method for separating transition metals
US-12383848-B2 · Aug 12, 2025 · US
Methods and compositions for purifying small extracellular vesicles
US-2025222373-A1 · Jul 10, 2025 · US
Fc-receptor based affinity chromatography
US-2024124519-A1 · Apr 18, 2024 · US
Buffers and methods for purifying proteins
US-2023406881-A1 · Dec 21, 2023 · US
Fc-receptor based affinity chromatography
US-11814409-B2 · Nov 14, 2023 · US
Method for removing color from drug substance of protein preparation
US-2023143066-A1 · May 11, 2023 · US
Electrolytic buffer generator
US-2023134486-A1 · May 4, 2023 · US
Chromatographic method for separating transition metals
US-2023046406-A1 · Feb 16, 2023 · US
Method for analyzing active ingredients of cannabis and control program for liquid chromatograph
US-11567045-B2 · Jan 31, 2023 · US
Coupling isoelectric focusing-based fractionation with mass spectrometry analysis
US-2023002445-A1 · Jan 5, 2023 · US
Electrolytic buffer generator
US-11466373-B2 · Oct 11, 2022 · US
Method for analyzing active ingredients of cannabis and control program for liquid chromatograph
US-2021372974-A1 · Dec 2, 2021 · US
Methods for preparing liquid mixtures
US-11175266-B2 · Nov 16, 2021 · US
Method for analyzing active ingredients of cannabis and control program for liquid chromatograph
US-11099162-B2 · Aug 24, 2021 · US
Vitro prediction of in vivo half-life
US-2021190795-A1 · Jun 24, 2021 · US
Methods for purifying heterodimeric multispecific antibodies from parental homodimeric antibody species
US-2021047387-A1 · Feb 18, 2021 · US
Methods for purifying heterodimeric multispecific antibodies from parental homodimeric antibody species
US-10787500-B2 · Sep 29, 2020 · US
Methods for preparing liquid mixtures
US-2020166487-A1 · May 28, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D15/168?
- CPC B01D15/168 is the Cooperative Patent Classification code for “pH gradient or chromatofocusing, i.e. separation according to the isoelectric point pI.”
- How many patents are filed under CPC B01D15/168 (pH gradient or chromatofocusing, i.e. separation according to the isoelectric point pI)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC B01D15/168 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).