Systems for removing perchlorate from water
US-11155476-B2 · Oct 26, 2021 · US
for anionic exchangers
for anionic exchangers · 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 | B01J49/57 |
| Official title | for anionic exchangers |
| Display label | for anionic exchangers |
| Total patents | 98 |
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 | 8 |
| 2017 | 8 |
| 2018 | 13 |
| 2019 | 6 |
| 2020 | 12 |
| 2021 | 12 |
| 2022 | 8 |
| 2023 | 11 |
| 2024 | 5 |
| 2025 | 9 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for reducing the amount of carbon disulphide (cs 2) in a hydrocarbon feed
US-2021284918-A1 · Sep 16, 2021 · US
Low-sodium resin
US-2021277161-A1 · Sep 9, 2021 · US
Method For Identifying The Unit Causing A Raw Water Leak In A Condenser Of A Thermal Power Plant
US-2021272711-A1 · Sep 2, 2021 · US
Dual-membrane on-line generator for acid or alkali solution
US-2021230756-A1 · Jul 29, 2021 · US
High specific activity preparation of f-18 tetrafluoroborate
US-2021225547-A1 · Jul 22, 2021 · US
Zirconium oxide module conditioning
US-2021187481-A1 · Jun 24, 2021 · US
Removing metal ions with a membrane based on anionic polyarylene ethersulfone and a cationic polymer with amino groups
US-2021178342-A1 · Jun 17, 2021 · US
Vitamin E production method and vitamin E production device
US-11014903-B2 · May 25, 2021 · US
Zirconium oxide module conditioning
US-10981148-B2 · Apr 20, 2021 · US
Method for exchanging interlayer anions of a layered double hydroxide
US-10882753-B2 · Jan 5, 2021 · US
Separation media, devices and applications thereof
US-2020360914-A1 · Nov 19, 2020 · US
Weak ion exchange particulate medium prepared from phenol-containing organic matter for anions contained in aqueous solutions
US-2020324281-A1 · Oct 15, 2020 · US
Methods of Removing Perchlorate from Water and Vessels and Systems for Practicing the Same
US-2020317539-A1 · Oct 8, 2020 · US
Compositions and methods for selenium removal
US-10752522-B2 · Aug 25, 2020 · US
Strong basic polyacrylate anion exchangers
US-2020261899-A1 · Aug 20, 2020 · US
Weak ion exchange particulate medium prepared from phenol-containing organic matter for anions contained in aqueous solutions
US-10722878-B1 · Jul 28, 2020 · US
Method for removing silica in salt water
US-2020207644-A1 · Jul 2, 2020 · US
Method of purifying water
US-10610860-B2 · Apr 7, 2020 · US
Method of purifying water
US-10610859-B2 · Apr 7, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01J49/57?
- CPC B01J49/57 is the Cooperative Patent Classification code for “for anionic exchangers.”
- How many patents are filed under CPC B01J49/57 (for anionic exchangers)?
- Our database includes 98 publications tagged with this CPC code.
- Is patent activity under CPC B01J49/57 growing?
- Publication counts under this code: 5 in 2024 vs 9 in 2025 (latest complete years).