Process for preparing aqueous gel inks with fixed color, and aqueous gel inks thereof
US12202988B2 · kind B2 · utility
0Cited by
4References
19Claims
0Family size
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Key dates
| Filing date | Nov 18, 2019 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Jan 9, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y40/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is a process for preparing in situ an aqueous gel ink with fixed color having the following steps: There is also an aqueous gel ink with fixed color obtained according to the process of the disclosure, comprising 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid and metallic nanoparticles.There is also a writing instrument comprising an aqueous gel ink with fixed color according to the disclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.