MAGNETIC POWDER FOR VALIDITY DETERMINING INK, MANUFACTURING METHOD FOR MAGNETIC POWDER FOR VALIDITY DETERMINING INK, MAGNETIC INK FOR VALIDITY DETERMINATION, PRINTING MEMBER FOR VALIDITY DETERMINATION, DETECTING DEVICE FOR PRINTING MEMBER FOR VALIDITY DETERMINATION, AND VALIDITY DETERMINATION DEVICE
US6545466B2 · kind B2 · utility
2Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Apr 22, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12465
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The magnetic powder for validity determining ink is composed of magnetic oxide power having a Curie temperature between −50°C. and 150°C. and a mean powder particle diameter of 10 &mgr;m or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.