Polymer beads
US6677042B2 · kind B2 · utility
7Cited by
0References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Sep 18, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to polymer beads comprising an anisotropic polymer material with helically twisted structure, to their use in reflective films, spraying or printing inks or as pigments, for optical or electrooptical, decorative or security applications, to a reflective film comprising one or more polymer beads in a transmissive binder, and to a security marking or security device comprising one or more polymer beads or comprising a reflective film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.