Process for making machine readable images
US6666995B1 · kind B1 · utility
7Cited by
20References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 2000 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | May 26, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for preparing embossed, finely-divided, thin, bright-metal particles which process comprises forming an embossed release surface to al least one side of a carrier sheet, depositing a metal film onto the release surface so that the metal film conforms to the embossed surface, solubilizing the release surface, removing the metal film from the carrier sheet, and breaking the thin metal film onto embossed particles having an average diameter of between 10 to 50 microns. The film may also take the form of an optical stack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.