Expandable microsphere, markable article, marked article, and method of making the same
US-2022380617-A1 · Dec 1, 2022 · US
using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating {(B41M5/38271 takes precedence)}
using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating {(B41M5/38271 takes precedence)} · 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 | B41M5/28 |
| Official title | using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating {(B41M5/38271 takes precedence)} |
| Display label | using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating {(B41M5/38271 takes precedence)} |
| Total patents | 72 |
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 | 6 |
| 2016 | 9 |
| 2017 | 8 |
| 2018 | 3 |
| 2019 | 8 |
| 2020 | 5 |
| 2021 | 11 |
| 2022 | 10 |
| 2023 | 6 |
| 2024 | 1 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of forming a security device
US-2022355608-A1 · Nov 10, 2022 · US
Drawing method, heat-sensitive recording medium, and drawing device
US-11485147-B2 · Nov 1, 2022 · US
Drawing method, erasing method, and drawing apparatus
US-11413878-B2 · Aug 16, 2022 · US
Information medium, recording apparatus, and reading apparatus
US-2022253621-A1 · Aug 11, 2022 · US
Drawing and erasing apparatus and erasing method
US-11364727-B2 · Jun 21, 2022 · US
Data protector, data protection seal, and drawing device
US-2022126596-A1 · Apr 28, 2022 · US
Thermal transfer ribbons and direct thermal print media including environmental exposure indicator material
US-2022112391-A1 · Apr 14, 2022 · US
Drawing method, heat-sensitive recording medium, and drawing device
US-2022055375-A1 · Feb 24, 2022 · US
Package for indicating heat-seal condition
US-11247410-B2 · Feb 15, 2022 · US
Drawing system and method of generating characteristic function
US-2021379905-A1 · Dec 9, 2021 · US
Drawing method, erasing method, and drawing apparatus
US-2021370688-A1 · Dec 2, 2021 · US
Drawing method and erasing method
US-2021362511-A1 · Nov 25, 2021 · US
Reversible recording medium and exterior member
US-11104109-B2 · Aug 31, 2021 · US
Method for manufacturing a data medium and data medium thus obtained
US-11090968-B2 · Aug 17, 2021 · US
Marking tabs with a two dimensional code
US-2021206186-A1 · Jul 8, 2021 · US
Drawing and erasing apparatus and erasing method
US-2021187965-A1 · Jun 24, 2021 · US
Thermosensitive recording medium and exterior member
US-2021178796-A1 · Jun 17, 2021 · US
Marking system and marking device
US-10982981-B2 · Apr 20, 2021 · US
Marking tabs with a two dimensional code
US-10981402-B2 · Apr 20, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B41M5/28?
- CPC B41M5/28 is the Cooperative Patent Classification code for “using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating {(B41M5/38271 takes precedence)}.”
- How many patents are filed under CPC B41M5/28 (using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating {(B41M5/38271 takes precedence)})?
- Our database includes 72 publications tagged with this CPC code.
- Is patent activity under CPC B41M5/28 growing?
- Publication counts under this code: 1 in 2024 vs 4 in 2025 (latest complete years).