Composition comprising hueing agent
US-12435299-B2 · Oct 7, 2025 · US
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Preparation of azo dyes from other azo compounds
Preparation of azo dyes from other azo compounds · 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 | C09B43/00 |
| Official title | Preparation of azo dyes from other azo compounds |
| Display label | Preparation of azo dyes from other azo compounds |
| Total patents | 21 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 1 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Azo compound, composition, film, laminate, and display device
US-12305104-B2 · May 20, 2025 · US
Composition comprising hueing agent
US-12195703-B2 · Jan 14, 2025 · US
Dichroic azo-azomethine dyes for liquid crystal compositions
US-12122919-B2 · Oct 22, 2024 · US
Composition Comprising Hueing Agent
US-2024301330-A1 · Sep 12, 2024 · US
Composition comprising hueing agent
US-12031113-B2 · Jul 9, 2024 · US
Azo compound, composition, film, laminate, and display device
US-2023416610-A1 · Dec 28, 2023 · US
Composition Comprising Hueing Agent
US-2023407207-A1 · Dec 21, 2023 · US
Bis-azo dyes for thin film polarizers and synthesis method
US-2023295438-A1 · Sep 21, 2023 · US
Dichroic azo-azomethine dyes for liquid crystal compositions
US-2022098412-A1 · Mar 31, 2022 · US
Composition Comprising Hueing Agent
US-2021277335-A1 · Sep 9, 2021 · US
Composition Comprising Hueing Agent
US-2021269747-A1 · Sep 2, 2021 · US
Dichroic azo compound and composition containing the same
US-10513612-B2 · Dec 24, 2019 · US
Dichroic dye compound, polarizing film, and uses thereof
US-10160734-B2 · Dec 25, 2018 · US
Water-soluble triazabutadienes
US-10047061-B2 · Aug 14, 2018 · US
Dichroic pigment compounds and compositions containing the same
US-10023743-B2 · Jul 17, 2018 · US
Compound and composition containing same
US-2018072890-A1 · Mar 15, 2018 · US
Compound and composition containing same
US-2018037739-A1 · Feb 8, 2018 · US
Dichroic dye compound, polarizing film, and uses thereof
US-2017226071-A1 · Aug 10, 2017 · US
Water-soluble triazabutadienes
US-2017114033-A1 · Apr 27, 2017 · US