Manipulating hydrophilicity of conventional dye molecules for tracer applications
US-12286574-B2 · Apr 29, 2025 · US
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Sulfonic acid groups
Sulfonic acid groups · 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 | C09B68/4253 |
| Official title | {Sulfonic acid groups} |
| Display label | Sulfonic acid groups |
| Total patents | 12 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 1 |
| 2023 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Manipulating hydrophilicity of conventional dye molecules for water tracer applications
US-11725139-B2 · Aug 15, 2023 · US
Manipulating hydrophilicity of conventional dye molecules for tracer applications
US-2023235218-A1 · Jul 27, 2023 · US
Manipulating hydrophilicity of conventional dye molecules for water tracer applications
US-2023183564-A1 · Jun 15, 2023 · US
Modified colorants and inkjet ink compositions comprising modified colorants
US-9963592-B2 · May 8, 2018 · US
Modified colorants and inkjet ink compositions comprising modified colorants
US-2017306156-A1 · Oct 26, 2017 · US
Modified Colorants and Inkjet Ink Compositions Comprising Modified Colorants
US-2017306157-A1 · Oct 26, 2017 · US
Modified colorants and inkjet ink compositions comprising modified colorants
US-9732227-B2 · Aug 15, 2017 · US
Modified colorants and inkjet ink compositions comprising modified colorants
US-9725598-B2 · Aug 8, 2017 · US
Production process for self-dispersible pigment, self-dispersible pigment, ink, ink cartridge and ink jet recording method
US-9458323-B2 · Oct 4, 2016 · US
Modified Colorants and Inkjet Ink Compositions Comprising Modified Colorants
US-2016075880-A1 · Mar 17, 2016 · US
Production process for self-dispersible pigment, self-dispersible pigment, ink, ink cartridge and ink jet recording method
US-2015376413-A1 · Dec 31, 2015 · US