Patent · US Expired

See-through panel assembly with retroreflective surface and method of making same

US5925437A · kind A · utility

31Cited by
2References
13Claims
0Family size

Inventor

Key dates

Filing dateOct 23, 1997
Grant dateJul 20, 1999
Priority date—
Expiry dateOct 23, 2017

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T428/24901
  • WIPO fieldSurface technology, coating
  • WIPO sectorChemistry

Abstract

A one-way see-through panel assembly enhanced by a retroreflective surface. The panel assembly has a first panel which has a dark light-absorbing surface and an opposite light reflecting surface. A retroreflective sheet is applied over the light reflecting surface to form an assembly. Light passageways, either perforations or a pattern of discrete transparent areas, are provided in the assembly. An image is imprinted on either the surface of the retroreflective panel or the light reflecting surface. The method includes mechanically perforating the assembly which is facilitated by the retroreflective sheet having non-glass reflective formations thereon.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.