Scratch-off structures
US11235230B2 · kind B2 · utility
0Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2016 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Dec 18, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/27
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Herein is described a scratch-off structure comprising the following layers in order: a substrate having a first layer showing information thereon, a second layer comprising a polymeric film and being substantially transparent; a third layer comprising a transparent electrostatic ink; a fourth layer, wherein the fourth layer is coloured. Methods for making scratch-off structures and collections of scratch-off structures are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.