Hybrid activated iron-biological water treatment system and method
US-2017362108-A1 · Dec 21, 2017 · US
Chromium or chromium compounds, e.g. chromates
Chromium or chromium compounds, e.g. chromates · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C02F2101/22 |
| Official title | Chromium or chromium compounds, e.g. chromates |
| Display label | Chromium or chromium compounds, e.g. chromates |
| Total patents | 348 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 22 |
| 2017 | 21 |
| 2018 | 26 |
| 2019 | 30 |
| 2020 | 35 |
| 2021 | 36 |
| 2022 | 43 |
| 2023 | 37 |
| 2024 | 32 |
| 2025 | 38 |
| 2026 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Photocatalyst particle, method for decomposing organic compound contained in alkaline aqueous solution with the same, and method for converting toxic ions contained in alkaline aqueous solution into non-toxic ions
US-2017348672-A1 · Dec 7, 2017 · US
Preferential removal of hexavalent chromium from contaminated water
US-2017334746-A1 · Nov 23, 2017 · US
Biological composite material loaded with magnetic nanoparticles with core-shell structure, the preparation therefore and the application
US-9809476-B2 · Nov 7, 2017 · US
Method for treating hexavalent chromium-containing aqueous solution
US-9802841-B2 · Oct 31, 2017 · US
Cross-linked diallyl quaternary ammonium salt tetrapolymers and methods thereof
US-9790296-B2 · Oct 17, 2017 · US
Filter and methods for heavy metal remediation of water
US-9776891-B2 · Oct 3, 2017 · US
Water production method
US-2017266618-A1 · Sep 21, 2017 · US
High temperature layered mixed-metal oxide materials with enhanced stability
US-2017266642-A1 · Sep 21, 2017 · US
Metal oxide coated diatomite aggregate and use thereof as adsorbent and fertilizer
US-2017259243-A1 · Sep 14, 2017 · US
Process for purification of diphenyl carbonate for the manufacturing of high quality polycarbonate
US-9732028-B2 · Aug 15, 2017 · US
Porous organic polymers for binding heavy metals
US-2017225969-A1 · Aug 10, 2017 · US
Methods for removing contaminants from aqueous systems
US-9725341-B2 · Aug 8, 2017 · US
Electroplating waste water treatment method
US-9708202-B2 · Jul 18, 2017 · US
Adsorbent with multiple layers
US-2017173558-A1 · Jun 22, 2017 · US
Biological composite material loaded with magnetic nanoparticles with core-shell structure, the preparation therefore and the application
US-2017174542-A1 · Jun 22, 2017 · US
Method of recovering chrome from a tannery process
US-9683270-B2 · Jun 20, 2017 · US
Particulate Sorption Medium Prepared From Partially Decomposed Organic Matter
US-2017157592-A1 · Jun 8, 2017 · US
Recovering chrome from a tannery process
US-2017158530-A1 · Jun 8, 2017 · US
Amphiphilic magnetic nanoparticles and aggregates to remove hydrocarbons and metal ions and synthesis thereof
US-2017092396-A1 · Mar 30, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F2101/22?
- CPC C02F2101/22 is the Cooperative Patent Classification code for “Chromium or chromium compounds, e.g. chromates.”
- How many patents are filed under CPC C02F2101/22 (Chromium or chromium compounds, e.g. chromates)?
- Our database includes 348 publications tagged with this CPC code.
- Is patent activity under CPC C02F2101/22 growing?
- Publication counts under this code: 32 in 2024 vs 38 in 2025 (latest complete years).