Opaque ink formulations and associated writing instruments
US-12209192-B2 · Jan 28, 2025 · US
indelible
indelible · 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 | C09D11/20 |
| Official title | indelible |
| Display label | indelible |
| Total patents | 25 |
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 | 2 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 8 |
| 2021 | 3 |
| 2022 | 2 |
| 2024 | 5 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Opaque ink composition
US-2024400845-A1 · Dec 5, 2024 · US
Ink formulations and associated writing instruments
US-12157826-B2 · Dec 3, 2024 · US
Ink eradicating fluid and kit containing it
US-12116493-B2 · Oct 15, 2024 · US
Epidermal penetration type ink composition
US-12104069-B2 · Oct 1, 2024 · US
Ink eradicating fluid and kit containing it
US-2024301225-A1 · Sep 12, 2024 · US
Color changing aqueous ink
US-2022259450-A1 · Aug 18, 2022 · US
Bearing assembly
US-11319993-B2 · May 3, 2022 · US
Aqueous ink composition for writing instrument
US-11041081-B2 · Jun 22, 2021 · US
Low alpha dose barium sulfate particle, and use and process for producing the same
US-11040888-B2 · Jun 22, 2021 · US
Epidermal penetration type ink composition
US-2021139731-A1 · May 13, 2021 · US
Low alpha dose barium sulfate particle, and use and process for producing the same
US-10836647-B2 · Nov 17, 2020 · US
Aqueous ink composition for writing instrument
US-2020317941-A1 · Oct 8, 2020 · US
Bearing assembly
US-2020309195-A1 · Oct 1, 2020 · US
Low alpha dose barium sulfate particle, and use and process for producing the same
US-2020270138-A1 · Aug 27, 2020 · US
Low alpha dose barium sulfate particle, and use and process for producing the same
US-2020270139-A1 · Aug 27, 2020 · US
Opaque Ink Formulations and Associated Writing Instruments
US-2020255680-A1 · Aug 13, 2020 · US
Ink Formulations and Associated Writing Instruments
US-2020224046-A1 · Jul 16, 2020 · US
Photocrosslinkable writing ink
US-10696854-B2 · Jun 30, 2020 · US
Ink and method of conducting an examination
US-10513621-B2 · Dec 24, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09D11/20?
- CPC C09D11/20 is the Cooperative Patent Classification code for “indelible.”
- How many patents are filed under CPC C09D11/20 (indelible)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC C09D11/20 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).