Systems and methods for generating hydrogen and magnetite from rock
US-12545576-B2 · Feb 10, 2026 · US
Obtaining chromium
Obtaining chromium · 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 | C22B34/32 |
| Official title | Obtaining chromium |
| Display label | Obtaining chromium |
| Total patents | 37 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing chromium-containing molten iron
US-12331368-B2 · Jun 17, 2025 · US
Aluminum sheet materials, and production methods and alloy compositions therefor with reduced energy consumption and co2 emissions
US-2025154635-A1 · May 15, 2025 · US
Method for co-extraction of vanadium, titanium and chromium from vanadium slag
US-12157931-B2 · Dec 3, 2024 · US
Method for producing chromium-containing molten iron
US-12134799-B2 · Nov 5, 2024 · US
Systems and methods for generating hydrogen and magnetite from rock
US-2024308843-A1 · Sep 19, 2024 · US
Systems and methods for generating hydrogen and magnetite from rock
US-12006212-B2 · Jun 11, 2024 · US
Method for producing ferronickel and removing chromium from nickel laterite ore
US-2024035115-A1 · Feb 1, 2024 · US
Method for recovering and purifying nickel from ferronickel
US-2023332268-A1 · Oct 19, 2023 · US
Systems and methods for generating hydrogen and magnetite from rock
US-2023271827-A1 · Aug 31, 2023 · US
Circular carbon process
US-2023227316-A1 · Jul 20, 2023 · US
Systems and methods for generating hydrogen and magnetite from rock
US-2023102312-A1 · Mar 30, 2023 · US
Method For Co-Extraction Of Vanadium, Titanium And Chromium From Vanadium Slag
US-2022356543-A1 · Nov 10, 2022 · US
Method for detoxifying chromium slag by using high sulfur coal
US-11478672-B2 · Oct 25, 2022 · US
Method for producing chromium-containing molten iron
US-2022195546-A1 · Jun 23, 2022 · US
Method for producing chromium-containing molten iron
US-2022195545-A1 · Jun 23, 2022 · US
Method for co-processing of waste incineration fly ash and chromium slag in landfill
US-11298732-B2 · Apr 12, 2022 · US
Chromium metal powder
US-11117188-B2 · Sep 14, 2021 · US
Method for co-processing of waste incineration fly ash and chromium slag in landfill
US-2021245211-A1 · Aug 12, 2021 · US
Method of preparation and application of ion-keeper adsorbent
US-11071967-B2 · Jul 27, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B34/32?
- CPC C22B34/32 is the Cooperative Patent Classification code for “Obtaining chromium.”
- How many patents are filed under CPC C22B34/32 (Obtaining chromium)?
- Our database includes 37 publications tagged with this CPC code.
- Is patent activity under CPC C22B34/32 growing?
- Publication counts under this code: 5 in 2024 vs 2 in 2025 (latest complete years).