Ultra bright dimeric or polymeric dyes with spacing linker groups
US-12560612-B2 · Feb 24, 2026 · US
Triarylmethane dyes in which at least one of the aromatic nuclei is heterocyclic {(phthaleins C09B11/24)}
Triarylmethane dyes in which at least one of the aromatic nuclei is heterocyclic {(phthaleins C09B11/24)} · 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 | C09B11/26 |
| Official title | Triarylmethane dyes in which at least one of the aromatic nuclei is heterocyclic {(phthaleins C09B11/24)} |
| Display label | Triarylmethane dyes in which at least one of the aromatic nuclei is heterocyclic {(phthaleins C09B11/24)} |
| Total patents | 49 |
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 | 5 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 2 |
| 2020 | 6 |
| 2021 | 8 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ultra bright dimeric or polymeric dyes with spacing linker groups
US-12461106-B2 · Nov 4, 2025 · US
Ultra bright dimeric or polymeric dyes with spacing linker groups
US-12270812-B2 · Apr 8, 2025 · US
Composition, optically anisotropic layer, liquid crystal cell, liquid crystal display device, sensor, lens, switching element, isolator, and camera
US-2025043183-A1 · Feb 6, 2025 · US
Ultra bright dimeric or polymeric dyes with spacing linker groups
US-2024255514-A1 · Aug 1, 2024 · US
Ultra bright dimeric or polymeric dyes with spacing linker groups
US-2024248094-A1 · Jul 25, 2024 · US
Colored photosensitive resin composition
US-11988962-B2 · May 21, 2024 · US
Malachite green based radio-chromic compounds and radiation sensing systems incorporating the compounds
US-11920039-B2 · Mar 5, 2024 · US
Laundry care compositions, methods, and test kits for determining authenticity
US-2023250364-A1 · Aug 10, 2023 · US
Ultra bright dimeric or polymeric dyes with spacing linker groups
US-2023129481-A1 · Apr 27, 2023 · US
Laundry care compositions, methods, and test kits for determining authenticity
US-11634663-B2 · Apr 25, 2023 · US
Photochromic indeno-fused naphthopyran compounds with reduced temperature dependence
US-11518751-B2 · Dec 6, 2022 · US
Amphiphilic and mesogenic organic dyes for tailor-made reflective low-dimensional materials
US-11407743-B2 · Aug 9, 2022 · US
Vital stain
US-11293870-B2 · Apr 5, 2022 · US
Photochromic Indeno-Fused Naphthopyran Compounds With Reduced Temperature Dependence
US-2021198226-A1 · Jul 1, 2021 · US
Amphiphilic and Mesogenic Organic Dyes for Tailor-Made Reflective Low-Dimensional Materials
US-2021122742-A1 · Apr 29, 2021 · US
Ultra bright dimeric or polymeric dyes with spacing linker groups
US-10989715-B2 · Apr 27, 2021 · US
Colored photosensitive resin composition
US-2021116806-A1 · Apr 22, 2021 · US
Ultra bright dimeric or polymeric dyes with spacing linker groups
US-2021096135-A1 · Apr 1, 2021 · US
Acetylpolyamine detection agent
US-2021032472-A1 · Feb 4, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09B11/26?
- CPC C09B11/26 is the Cooperative Patent Classification code for “Triarylmethane dyes in which at least one of the aromatic nuclei is heterocyclic {(phthaleins C09B11/24)}.”
- How many patents are filed under CPC C09B11/26 (Triarylmethane dyes in which at least one of the aromatic nuclei is heterocyclic {(phthaleins C09B11/24)})?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC C09B11/26 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).