Retroreflective article having at least one valve and method of making same
US7252396B2 · kind B2 · utility
1Cited by
49References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2004 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Jul 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/124
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A retroreflective article having at least one valve is disclosed. Each valve may include a channel extending from a first major surface to a second major surface of the retroreflective material, and at least one movable member proximate the channel. The at least one movable member is movable between a closed position and an open position. When in the closed position, the at least one movable member obstructs at least a portion of the channel. A method of making a retroreflective article having at least one valve is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.