Water-absorbent resin composition, absorbent material and absorbent article
US-2024424473-A1 · Dec 26, 2024 · US
containing free carbon, e.g. activated carbon
containing free carbon, e.g. activated carbon · 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 | B01J20/324 |
| Official title | {containing free carbon, e.g. activated carbon} |
| Display label | containing free carbon, e.g. activated carbon |
| Total patents | 187 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 11 |
| 2017 | 17 |
| 2018 | 15 |
| 2019 | 14 |
| 2020 | 15 |
| 2021 | 30 |
| 2022 | 15 |
| 2023 | 22 |
| 2024 | 17 |
| 2025 | 18 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Filter and method for producing same
US-10286348-B2 · May 14, 2019 · US
Carbon-based porous material and preparation method and use thereof
US-2019127227-A1 · May 2, 2019 · US
Hybrid material for chromatographic separations comprising a superficially porous core and a surrounding material
US-2019091657-A1 · Mar 28, 2019 · US
Synthesis of a Novel Ordered Mesoporous Carbon Using COK-19 Template for Water and Wastewater Treatment
US-2019046953-A1 · Feb 14, 2019 · US
Method for preparation of various carbon allotropes based magnetic adsorbents with high magnetization
US-10166529-B2 · Jan 1, 2019 · US
Filtering device, in particular for the air to be supplied to a fuel cell
US-10164280-B2 · Dec 25, 2018 · US
Heat Exchanger and Method for Use Thereof
US-2018356165-A1 · Dec 13, 2018 · US
Separation of a target substance frm a fluid or mixture using encapsulated sorbents
US-2018318755-A1 · Nov 8, 2018 · US
Pet pad and manufacturing method of pet pad
US-10104866-B2 · Oct 23, 2018 · US
Carbon Molecular Sieve Adsorbents Prepared From Activated Carbon and Useful For Propylene-Propane Separation
US-2018280927-A1 · Oct 4, 2018 · US
Class of tunable gas storage and sensor materials
US-10071360-B2 · Sep 11, 2018 · US
Separating agent for liquid chromatography, separation column, and method for separating and purifying biopolymer using them
US-2018243725-A1 · Aug 30, 2018 · US
Adsorption device for compressed gas
US-2018243686-A1 · Aug 30, 2018 · US
Textile protective material of a new type and method for producing same
US-2018207613-A1 · Jul 26, 2018 · US
Separation of a target substance from a fluid or mixture using encapsulated sorbents
US-10029206-B2 · Jul 24, 2018 · US
Polymeric amine based carbon dioxide adsorbents
US-10010861-B2 · Jul 3, 2018 · US
Sorption-based atmospheric water harvesting device
US-2018171604-A1 · Jun 21, 2018 · US
Method for tailoring electrical resistivity of molecular sieve adsorbents for resistive heating application
US-2018126357-A1 · May 10, 2018 · US
Polymeric amine based carbon dioxide adsorbents
US-2018008958-A1 · Jan 11, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01J20/324?
- CPC B01J20/324 is the Cooperative Patent Classification code for “containing free carbon, e.g. activated carbon.”
- How many patents are filed under CPC B01J20/324 (containing free carbon, e.g. activated carbon)?
- Our database includes 187 publications tagged with this CPC code.
- Is patent activity under CPC B01J20/324 growing?
- Publication counts under this code: 17 in 2024 vs 18 in 2025 (latest complete years).