Sheet material marker surface for roadways and the like
US4681401A · kind A · utility
37Cited by
11References
9Claims
0Family size
Inventor
Key dates
| Filing date | Sep 23, 1985 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Sep 23, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/578
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This disclosure involves an improved thin surface-marking strip for adhering to a road surface or the like, employing novel flattened somewhat saw-tooth wedges embodying retroreflective material and of preferably substantially trapezoidal shape, with rather critical separations between wedges relative to height and length of the wedges to obviate shadow effects, provide improved daylight observation, and to increase effectiveness and life, particularly under conditions of rain-covered surfaces and snow removal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.