Method for making retroreflective elements having enhanced retroreflectivity under dry and/or wet conditions
US6247818A · kind A · utility
21Cited by
81References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1998 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Oct 20, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/252
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention comprises a method for making retroreflective elements which are retroreflective under dry and/or wet conditions. The method provides a means for placing optical elements and/or skid-resistant particles on selected surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.