Coloring agent composition, film, optical filter, and near infrared absorbing compound
US-2026022246-A1 · Jan 22, 2026 · US
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Indamines; Indophenols
Indamines; Indophenols · 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 | C09B53/02 |
| Official title | Indamines; Indophenols |
| Display label | Indamines; Indophenols |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 1 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compound for optical absorbent
US-2025197346-A1 · Jun 19, 2025 · US
Light absorption filter, optical filter, manufacturing method for optical filter, organic electroluminescent display device, inorganic electroluminescent display device, and liquid crystal display device
US-2025116897-A1 · Apr 10, 2025 · US
Optical filter, and camera module and electronic device comprising the same
US-11719867-B2 · Aug 8, 2023 · US
Curable composition, cured film, optical filter, laminate, solid image pickup element, image display device, and infrared sensor
US-11236215-B2 · Feb 1, 2022 · US
Optical filter, and camera module and electronic device comprising the same
US-2022019005-A1 · Jan 20, 2022 · US
Optical filter, and camera module and electronic device comprising the same
US-11181673-B2 · Nov 23, 2021 · US
Derivatives of PPD useful for coloring hair and skin
US-11129782-B2 · Sep 28, 2021 · US
Compound, liquid composition, thermal transfer recording sheet, toner, resist composition for color filter, and color filter
US-11021436-B2 · Jun 1, 2021 · US
Derivatives of ppd useful for coloring hair and skin
US-2020390670-A1 · Dec 17, 2020 · US
Compound, liquid composition, thermal transfer recording sheet, toner, resist composition for color filter, and color filter
US-2020347007-A1 · Nov 5, 2020 · US
(Dis)symmetric azomethine-type direct dye comprising at least one pyrazolopyridine unit, process for dyeing keratin fibers using this dye
US-10731038-B2 · Aug 4, 2020 · US
(dis)symmetric azomethine-type direct dye comprising at least one pyrazolopyridine unit, process for dyeing keratin fibers using this dye
US-2019309170-A1 · Oct 10, 2019 · US
Optical filter, and camera module and electronic device comprising the same
US-2019129078-A1 · May 2, 2019 · US
Curable composition, cured film, optical filter, laminate, solid image pickup element, image display device, and infrared sensor
US-2018355149-A1 · Dec 13, 2018 · US