Retroflective sheeting
US4367920A · kind A · utility
72Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1981 |
| Grant date | Jan 11, 1983 |
| Priority date | — |
| Expiry date | Jun 19, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/128
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
New methods for making "embedded-lens" retroreflective sheeting, and new forms of such sheeting, are provided. The new sheetings are retroreflective through an increased angular range, and also provide brighter overall retroreflectivity and other advantageous properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.