Methods of adjusting carbon and silica content in rice hull ash (RHA) byproducts to control carbothermal reduction forming nanostructured silicon carbide, silicon nitride, silicon oxynitride nanocomposites
US-12506144-B2 · Dec 23, 2025 · US
Silicon oxynitrides
Silicon oxynitrides · 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 | C01B21/0823 |
| Official title | {Silicon oxynitrides} |
| Display label | Silicon oxynitrides |
| Total patents | 32 |
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 | 2 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Window module and display device including the same
US-12487377-B2 · Dec 2, 2025 · US
Methods of adjusting carbon and silica content in rice hull ash (rha) byproducts to control carbothermal reduction forming nanostructured silicon carbide, silicon nitride, silicon oxynitride nanocomposites
US-2025132323-A1 · Apr 24, 2025 · US
Anode active material and its manufacturing method, lithium ion battery and all-solid-state lithium thin-film battery using the same
US-2025079461-A1 · Mar 6, 2025 · US
Barrier film
US-12098071-B2 · Sep 24, 2024 · US
Phosphor process for producing a phosphor and optoelectronic device
US-11932791-B2 · Mar 19, 2024 · US
Window module and display device including the same
US-2023244002-A1 · Aug 3, 2023 · US
Degradable resin molding and production method for degradable resin molding
US-11560622-B2 · Jan 24, 2023 · US
Phosphor process for producing a phosphor and optoelectronic device
US-2022135880-A1 · May 5, 2022 · US
Chlorodisilazanes
US-2022119947-A1 · Apr 21, 2022 · US
N—H free and Si-rich per-hydridopolysilzane compositions, their synthesis, and applications
US-11203528-B2 · Dec 21, 2021 · US
Degradable resin molding and production method for degradable resin molding
US-2021388491-A1 · Dec 16, 2021 · US
Barrier film
US-2021387855-A1 · Dec 16, 2021 · US
Polymer precursors for solid state electrolytes
US-2021340011-A1 · Nov 4, 2021 · US
Bisaminoalkoxysilane compounds and methods for using same to deposit silicon-containing films
US-11142658-B2 · Oct 12, 2021 · US
Yellow emitting luminophore and illuminating device
US-2021269714-A1 · Sep 2, 2021 · US
Method for preparing photomask blank, photomask blank, method for preparing photomask, photomask, and metallic chromium target
US-10782608-B2 · Sep 22, 2020 · US
N-h free and si-rich per-hydridopolysilzane compositions, their synthesis, and applications
US-2020277190-A1 · Sep 3, 2020 · US
N—H free and SI-rich per-hydridopolysilzane compositions, their synthesis, and applications
US-10647578-B2 · May 12, 2020 · US
Bisaminoalkoxysilane Compounds And Methods For Using Same To Deposit Silicon-Containing Films
US-2019359637-A1 · Nov 28, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B21/0823?
- CPC C01B21/0823 is the Cooperative Patent Classification code for “Silicon oxynitrides.”
- How many patents are filed under CPC C01B21/0823 (Silicon oxynitrides)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC C01B21/0823 growing?
- Publication counts under this code: 2 in 2024 vs 4 in 2025 (latest complete years).