Thermochromic Dye Compositions And Method For Preparing Same
US-2020316975-A1 · Oct 8, 2020 · US
Organic colour formers, e.g. leuco dyes
Organic colour formers, e.g. leuco dyes · 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 | B41M5/323 |
| Official title | Organic colour formers, e.g. leuco dyes |
| Display label | Organic colour formers, e.g. leuco dyes |
| Total patents | 150 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 13 |
| 2017 | 11 |
| 2018 | 10 |
| 2019 | 11 |
| 2020 | 19 |
| 2021 | 13 |
| 2022 | 19 |
| 2023 | 12 |
| 2024 | 16 |
| 2025 | 16 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Erasing unit and erasing method
US-2020230992-A1 · Jul 23, 2020 · US
Tamper-proof medium for thermal printing
US-2020198386-A1 · Jun 25, 2020 · US
Thermosensitive recording material and laminate
US-2020180336-A1 · Jun 11, 2020 · US
Thermal transfer recording sheet
US-10647142-B2 · May 12, 2020 · US
Recording material and compound
US-2020086669-A1 · Mar 19, 2020 · US
Recording medium and recording device
US-2019389235-A1 · Dec 26, 2019 · US
Thermosensitive recording medium
US-10513137-B2 · Dec 24, 2019 · US
Recording material and recording sheet
US-2019381820-A1 · Dec 19, 2019 · US
Package for indicating heat-seal condition
US-2019375167-A1 · Dec 12, 2019 · US
A multicolour laser marking method
US-2019351691-A1 · Nov 21, 2019 · US
Thermosensitive recording medium
US-10464362-B2 · Nov 5, 2019 · US
Reversible recording medium, reversible recording medium coating, and exterior member
US-2019275820-A1 · Sep 12, 2019 · US
Reversible recording medium and exterior member
US-2019275819-A1 · Sep 12, 2019 · US
Process for manufacturing a laser markable packaging
US-2019232699-A1 · Aug 1, 2019 · US
Fiber assembly, display unit, and electronic apparatus
US-2019146299-A1 · May 16, 2019 · US
Thermosensitive recording materials containing chelating agents
US-2019001727-A1 · Jan 3, 2019 · US
Direct thermal media and registration sensor system and method for use in a color thermal printer
US-2018319181-A1 · Nov 8, 2018 · US
Thermosensitive recording materials containing chelating agents
US-10118427-B2 · Nov 6, 2018 · US
Thermosensitive recording medium
US-2018311987-A1 · Nov 1, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B41M5/323?
- CPC B41M5/323 is the Cooperative Patent Classification code for “Organic colour formers, e.g. leuco dyes.”
- How many patents are filed under CPC B41M5/323 (Organic colour formers, e.g. leuco dyes)?
- Our database includes 150 publications tagged with this CPC code.
- Is patent activity under CPC B41M5/323 growing?
- Publication counts under this code: 16 in 2024 vs 16 in 2025 (latest complete years).