Iron-rich permanent magnet
US-12573551-B2 · Mar 10, 2026 · US
with iron, cobalt or nickel
with iron, cobalt or nickel · 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 | C01B21/0622 |
| Official title | {with iron, cobalt or nickel} |
| Display label | with iron, cobalt or nickel |
| Total patents | 50 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 5 |
| 2017 | 1 |
| 2018 | 7 |
| 2019 | 5 |
| 2020 | 7 |
| 2021 | 9 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 7 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Iron-nitride magnet by nitriding a porous structure
US-2026018322-A1 · Jan 15, 2026 · US
Iron-nitride magnet by nitriding a porous structure
US-12424358-B2 · Sep 23, 2025 · US
Applied magnetic field synthesis and processing of iron nitride magnetic materials
US-12338536-B2 · Jun 24, 2025 · US
Iron-nitride magnet by nitriding a porous structure
US-2024363269-A1 · Oct 31, 2024 · US
Method for manufacturing nitride catalyst
US-12077873-B2 · Sep 3, 2024 · US
Active material and fluoride ion battery
US-12027701-B2 · Jul 2, 2024 · US
Iron-nitride magnet by nitriding a porous structure
US-12014853-B2 · Jun 18, 2024 · US
Iron-rich permanent magnet
US-2024112855-A1 · Apr 4, 2024 · US
Active material and fluoride ion battery
US-2024047674-A1 · Feb 8, 2024 · US
Iron-rich permanent magnet
US-11875934-B2 · Jan 16, 2024 · US
Active material, and fluoride ion battery
US-11817580-B2 · Nov 14, 2023 · US
Method of manufacturing a three-dimensional object
US-11780160-B2 · Oct 10, 2023 · US
Iron nitride powder with anisotropic shape
US-2023024845-A1 · Jan 26, 2023 · US
Iron nitride powder with anisotropic shape
US-11511344-B2 · Nov 29, 2022 · US
Catalyst material and method for manufacturing the same
US-11142836-B2 · Oct 12, 2021 · US
Method of manufacturing a three-dimensional object
US-2021296027-A1 · Sep 23, 2021 · US
Iron-nitride magnet by nitriding a porous structure
US-2021202142-A1 · Jul 1, 2021 · US
Applied magnetic field synthesis and processing of iron nitride magnetic materials
US-2021180174-A1 · Jun 17, 2021 · US
Method of manufacturing a bulk nitride, carbide, or boride-containing material
US-11031161-B2 · Jun 8, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B21/0622?
- CPC C01B21/0622 is the Cooperative Patent Classification code for “with iron, cobalt or nickel.”
- How many patents are filed under CPC C01B21/0622 (with iron, cobalt or nickel)?
- Our database includes 50 publications tagged with this CPC code.
- Is patent activity under CPC C01B21/0622 growing?
- Publication counts under this code: 7 in 2024 vs 2 in 2025 (latest complete years).