Erasable ink composition containing a polymer dye obtained from ethylenic monomers and marking instrument containing same
US5900445A · kind A · utility
14Cited by
80References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1996 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | May 20, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S260/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An erasable ink composition contains a water-insoluble polymeric dye obtained by copolymerizing ethylenically unsaturated monomers at least one of which possesses a dye moiety covalently bonded thereto. The ink is intended for use in any of a variety of marking instruments, in particular, a ball-point pen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.