Direction-indicating pavement marking having raised protuberances and method of making
US5941655A · kind A · utility
18Cited by
26References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Jul 16, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24355
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Retroreflective article (10), e.g., in the form of a pavement marking, having raised, nonintegral protuberances (16) that exhibit good dry retroreflectivity and recover retroreflectivity quickly after exposure to water. The protuberances may comprise a thermoplastic polymer body and have at least two different portions. Partially embedded in the protuberances are different sets of optical elements (14) which are in optical association with a light scattering agent. The protuberances are disposed on top of a conformable base sheet (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.