Photochromic phase change inks
US7708396B2 · kind B2 · utility
22Cited by
18References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2006 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Mar 4, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/34
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink set is made up of at least three differently colored phase change inks, for example cyan, magenta and yellow, wherein at least one of the colored phase change inks is a photochromic ink that contains a photochromic material. Upon exposure to activating radiation such as ultraviolet light, the at least one photochromic ink changes to a color different from the color of the photochromic ink prior to exposure to the activating radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.