Ink compositions
US5938827A · kind A · utility
16Cited by
20References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1998 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Feb 2, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/328
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink composition containing a mixture of two black colorants, a vehicle, betaine, and N,N'-bis(3-aminopropyl)ethylenediamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.