Diester of bisphenol fluorene compounds and thermochromic pigment compositions comprising the same
US-11814528-B2 · Nov 14, 2023 · US
specially adapted for ball-point writing instruments
specially adapted for ball-point writing instruments · 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 | C09D11/18 |
| Official title | specially adapted for ball-point writing instruments |
| Display label | specially adapted for ball-point writing instruments |
| Total patents | 99 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 5 |
| 2017 | 7 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 8 |
| 2021 | 9 |
| 2022 | 15 |
| 2023 | 14 |
| 2024 | 16 |
| 2025 | 15 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Oil-based ink composition for writing implements
US-11795336-B2 · Oct 24, 2023 · US
Ink composition for water-based ballpoint pen
US-2023167316-A1 · Jun 1, 2023 · US
Thermochromic pigment compositions
US-11655387-B2 · May 23, 2023 · US
Oil-based ink composition for writing instrument
US-11649363-B2 · May 16, 2023 · US
Aqueous ink composition for ballpoint pen
US-11634601-B2 · Apr 25, 2023 · US
Writing gel ink for pens without follower
US-2023093346-A1 · Mar 23, 2023 · US
Coloring tablet and water-based ink composition for writing instrument using the same
US-2023072944-A1 · Mar 9, 2023 · US
Ink composition for water-based ballpoint pens
US-2023048616-A1 · Feb 16, 2023 · US
Dispersion liquid of colored resin fine particles for aqueous ink, and aqueous ink composition for writing instruments using same
US-11560489-B2 · Jan 24, 2023 · US
Ink composition for aqueous ballpoint pens
US-2022411651-A1 · Dec 29, 2022 · US
Aqueous ink composition for writing instruments
US-2022389250-A1 · Dec 8, 2022 · US
Composite colored particle
US-2022380612-A1 · Dec 1, 2022 · US
Reverse photochromic inks including encapsulated reverse photochromic colorants, and associated methods and writing instruments
US-2022372322-A1 · Nov 24, 2022 · US
Reverse photochromic inks, and associated methods and writing instruments
US-2022372321-A1 · Nov 24, 2022 · US
Marking compositions
US-2022372312-A1 · Nov 24, 2022 · US
Aqueous ink composition for writing instruments
US-2022363925-A1 · Nov 17, 2022 · US
Developer and thermosensitive recording material
US-2022281255-A1 · Sep 8, 2022 · US
Color changing aqueous ink
US-2022259450-A1 · Aug 18, 2022 · US
Water-based ballpoint pen
US-2022194118-A1 · Jun 23, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09D11/18?
- CPC C09D11/18 is the Cooperative Patent Classification code for “specially adapted for ball-point writing instruments.”
- How many patents are filed under CPC C09D11/18 (specially adapted for ball-point writing instruments)?
- Our database includes 99 publications tagged with this CPC code.
- Is patent activity under CPC C09D11/18 growing?
- Publication counts under this code: 16 in 2024 vs 15 in 2025 (latest complete years).