Cellular retroreflective sheeting
US4025159A · kind A · utility
387Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1976 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | Feb 17, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/128
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Cellular retroreflective sheeting, which comprises a base layer of retroreflective elements and a transparent cover film supported in spaced relation away from the base layer by a network of narrow intersecting bonds that form hermetically sealed cells within which retroreflective elements are isolated from retroreflective elements of different cells, is given greater durability by use of bonds that are cured in situ after they have been thermoformed into sealing contact between the cover film and base layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.