Retroreflective microprismatic material with top face curvature and method of making same
US5780140A · kind A · utility
49Cited by
8References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Sep 23, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24612
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Retroreflective material is disclosed which is formed of an array of microprisms which reflect light more uniformly by forming a concave curvature in the base face of the prisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.