Environmentally-clean fire inhibiting biochemical compositions, solutions and powders, and methods of and apparatus for producing fire protected wood products
US-2026069911-A1 · Mar 12, 2026 · US
Compounds of alkali metals or ammonium
Compounds of alkali metals or ammonium · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B27K3/20 |
| Official title | Compounds of alkali metals or ammonium |
| Display label | Compounds of alkali metals or ammonium |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 6 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Environmentally-clean water-based fire inhibiting biochemical compositions, solutions, powders and methods of and apparatus for producing fire protected wood and engineered wood products
US-2026014403-A1 · Jan 15, 2026 · US
Method for producing modified wood-based material, furan derivative resinification solution, and modified wood-based material
US-12343896-B2 · Jul 1, 2025 · US
Strong and tough structural wood materials, and methods for fabricating and use thereof
US-2025162189-A1 · May 22, 2025 · US
Strong and tough structural wood materials, and methods for fabricating and use thereof
US-12285882-B2 · Apr 29, 2025 · US
Construction of structural materials from lumber using a carbonate or oxygen pre-treatment and densification
US-2024335975-A1 · Oct 10, 2024 · US
Delignified wood materials, and methods for fabricating and use thereof
US-2024269882-A1 · Aug 15, 2024 · US
In situ pigmentation of decorative materials
US-2024270922-A1 · Aug 15, 2024 · US
Method of and apparatus for protecting and tracking carbon mass stored in wood materials contained in prefabricated wood-building assemblies, from the destructive energy of fire and releasing back into the atmosphere in the form of carbon dioxide and/or other greenhouse gases contributing to global warming
US-2024257265-A1 · Aug 1, 2024 · US
Delignified wood materials, and methods for fabricating and use thereof
US-11958209-B2 · Apr 16, 2024 · US
Waste-free processing for lignin modification of fibrous plant materials, and lignin-modified fibrous plant materials
US-2024083067-A1 · Mar 14, 2024 · US
Method for producing modified wood-based material, furan derivative resinification solution, and modified wood-based material
US-2023264382-A1 · Aug 24, 2023 · US
Multifunctional wood preservative composition and wood preservation treatment method using the same
US-2023219251-A1 · Jul 13, 2023 · US
Strong and tough structural wood materials, and methods for fabricating and use thereof
US-2023166427-A1 · Jun 1, 2023 · US
Mixtures of ammonium polyphosphate and at least one soluble ionic compound containing sulfate and/or is capable of releasing sulfate ions
US-11628589-B2 · Apr 18, 2023 · US
Strong and tough structural wood materials, and methods for fabricating and use thereof
US-11554514-B2 · Jan 17, 2023 · US
Halogen-free inorganic flame retardant material and preparation method and application thereof
US-2022098488-A1 · Mar 31, 2022 · US
Strong and tough structural wood materials, and methods for fabricating and use thereof
US-2022040881-A1 · Feb 10, 2022 · US
Strong and tough structural wood materials, and methods for fabricating and use thereof
US-11130256-B2 · Sep 28, 2021 · US
Modified wooden sheet, method for producing same, and modifying agent
US-2021260790-A1 · Aug 26, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B27K3/20?
- CPC B27K3/20 is the Cooperative Patent Classification code for “Compounds of alkali metals or ammonium.”
- How many patents are filed under CPC B27K3/20 (Compounds of alkali metals or ammonium)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC B27K3/20 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).