Pavement marker with improved daytime visibility
US6558069B1 · kind B1 · utility
4Cited by
15References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 2000 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | May 26, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/553
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pavement marker having improved daytime visibility comprises a transparent fluorescent top portion having smooth flat parallel top and bottom surfaces with a front edge therebetween and air interfacing most of the bottom surface. Light received by the smooth flat top surface of the top portion is directed internally through the top portion and emitted from the front edge, to provide a visible signal to drivers of oncoming vehicles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.