R-T-B-based rare earth magnet particles, process for producing the R-T-B-based rare earth magnet particles, and bonded magnet
US-12562297-B2 · Feb 24, 2026 · US
Treatment for obtaining particular effects
Treatment for obtaining particular effects · 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 | C21D2201/00 |
| Official title | Treatment for obtaining particular effects |
| Display label | Treatment for obtaining particular effects |
| Total patents | 53 |
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 | 3 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 4 |
| 2021 | 8 |
| 2022 | 10 |
| 2023 | 7 |
| 2024 | 3 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydrogen storage alloys
US-2025188571-A1 · Jun 12, 2025 · US
Al-si coated press hardening component, a preparation method and use thereof
US-2024271238-A1 · Aug 15, 2024 · US
Method for manufacturing reference piece for measuring retained austenite
US-2024182994-A1 · Jun 6, 2024 · US
Hot-stretch-reduced electric resistance welded pipe
US-2024141451-A1 · May 2, 2024 · US
Bearing assembly
US-11835089-B2 · Dec 5, 2023 · US
Bearing assembly
US-2023383788-A1 · Nov 30, 2023 · US
High-strength steels for the formation of wear-protective lubricious tribofilms directly from hydrocarbon fluids
US-11781195-B2 · Oct 10, 2023 · US
Steel material exhibiting high toughness, method for manufacturing the same, and structural steel plate fabricated using steel material
US-11767582-B2 · Sep 26, 2023 · US
Hydrogen storage alloys
US-2023212718-A1 · Jul 6, 2023 · US
Low-Cost Non-Oriented Electrical Steel Plate With Extremely Low Aluminum Content and Manufacturing Method Therefor
US-2023203613-A1 · Jun 29, 2023 · US
Steel material exhibiting high toughness, method for manufacturing the same, and structural steel plate fabricated using steel material
US-2023057152-A1 · Feb 23, 2023 · US
Method for manufacturing alloy ribbon piece
US-11535906-B2 · Dec 27, 2022 · US
Method for manufacturing sintered magnet
US-11515086-B2 · Nov 29, 2022 · US
High-strength steel sheet
US-11486028-B2 · Nov 1, 2022 · US
Method for producing metallic components having adapted component properties
US-11459628-B2 · Oct 4, 2022 · US
Methods of Modifying a Domain Structure of a Magnetic Ribbon, Manufacturing an Apparatus, and Magnetic Ribbon Having a Domain Structure
US-2022298615-A1 · Sep 22, 2022 · US
Method for making hydrogen storage alloys
US-2022275480-A1 · Sep 1, 2022 · US
High-strength steels for the formation of wear-protective lubricious tribofilms directly from hydrocarbon fluids
US-2022195549-A1 · Jun 23, 2022 · US
Gold-colored steel sheet and manufacturing method thereof
US-11339459-B2 · May 24, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D2201/00?
- CPC C21D2201/00 is the Cooperative Patent Classification code for “Treatment for obtaining particular effects.”
- How many patents are filed under CPC C21D2201/00 (Treatment for obtaining particular effects)?
- Our database includes 53 publications tagged with this CPC code.
- Is patent activity under CPC C21D2201/00 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).