Erasable ink composition containing a graft-polymerized dye
US5756561A · kind A · utility
11Cited by
14References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Jun 4, 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 the graft polymerization of a preformed water-insoluble polymer with a dye monomer possessing at least one ethylenically unsaturated site. 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.