Magnetodielectric y-phase strontium hexagonal ferrite materials formed by sodium substitution
US-2021366634-A1 · Nov 25, 2021 · US
Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead
Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead · 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 | C04B35/2641 |
| Official title | {Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead} |
| Display label | Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead |
| Total patents | 101 |
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 | 9 |
| 2016 | 9 |
| 2017 | 5 |
| 2018 | 7 |
| 2019 | 13 |
| 2020 | 9 |
| 2021 | 14 |
| 2022 | 13 |
| 2023 | 13 |
| 2024 | 4 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Proton conducting electrolyte
US-11171351-B2 · Nov 9, 2021 · US
Increased resonant frequency potassium-doped hexagonal ferrite
US-11164689-B2 · Nov 2, 2021 · US
Ferrite sintered magnet
US-2021296030-A1 · Sep 23, 2021 · US
Catalyst-containing oxygen transport membrane
US-11052353-B2 · Jul 6, 2021 · US
Ultra-high dielectric constant garnet
US-11021400-B2 · Jun 1, 2021 · US
Magnetodielectric y-phase strontium hexagonal ferrite materials formed by sodium substitution
US-10984928-B2 · Apr 20, 2021 · US
Ferrite sintered magnet
US-2021090768-A1 · Mar 25, 2021 · US
Ferrite sintered magnet, ferrite particle, bonded magnet and rotating electric machine
US-2020312497-A1 · Oct 1, 2020 · US
Ferrite sintered magnet and rotating electric machine comprising the same
US-2020312495-A1 · Oct 1, 2020 · US
Cathode material and fuel cell
US-10749187-B2 · Aug 18, 2020 · US
Ferrite sintered magnet
US-2020255339-A1 · Aug 13, 2020 · US
Ferrite sintered magnet
US-2020251262-A1 · Aug 6, 2020 · US
Materials for ammonia synthesis
US-2020224323-A1 · Jul 16, 2020 · US
Proton conducting electrolyte
US-2020067120-A1 · Feb 27, 2020 · US
Cathode material and fuel cell
US-2020044260-A9 · Feb 6, 2020 · US
Fuel cell
US-10535882-B2 · Jan 14, 2020 · US
Ultra-high dielectric constant garnet
US-2019389773-A1 · Dec 26, 2019 · US
Ferrite sintered magnet
US-2019304641-A1 · Oct 3, 2019 · US
Ferrite sintered magnet
US-2019304643-A1 · Oct 3, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B35/2641?
- CPC C04B35/2641 is the Cooperative Patent Classification code for “Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead.”
- How many patents are filed under CPC C04B35/2641 (Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead)?
- Our database includes 101 publications tagged with this CPC code.
- Is patent activity under CPC C04B35/2641 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).