Laser marking of substrates
US8278244B2 · kind B2 · utility
44Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2006 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Oct 21, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24934
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for marking an substrate, comprising coating the substrate with a white or colorless solution of a soluble alkali or alkaline earth metal salt of a weak acid and irradiating areas of the substrate to be marked such that those areas change color, wherein the substrate comprises a polysaccharide material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.