Title of Invention

RAISED PAVEMENT MARKER WITH IMPROVED LENS

Abstract The present disclosure relates to improved raised pavement markers having a totally-internal-reflective lens. The disclosure also relates to methods of manufacturing the raised pavement marker. The raised pavement markers described below comprise a housing connected to a totally-internal-reflective lens. The totally- internal-reflective lens comprises a retroreflective element having a smooth surface generally opposite a plurality of cube comer elements. A film is attached to the retroreflective element at the apexes of the cube comer elements to form spaces, i.e., an air gap, between the film and the cubes. The film and retroreflective element cooperate to form the totally-internal-reflective lens. Light entering the retroreflective element through the smooth surface is retroreflected at the cube/air interface. Methods of manufacturing include, for example, forming a shell with the retroreflective element and attaching the film to the apexes of the cube comer elements.
Full Text

Documents:

in-pct-2002-1324-che abstract.pdf

in-pct-2002-1324-che claims.pdf

in-pct-2002-1324-che correspondence others.pdf

in-pct-2002-1324-che description (complete).pdf

in-pct-2002-1324-che drawings.pdf

in-pct-2002-1324-che form 1.pdf

in-pct-2002-1324-che form 18.pdf

in-pct-2002-1324-che form 3.pdf

in-pct-2002-1324-che form 5.pdf

in-pct-2002-1324-che petition.pdf


Patent Number 216603
Indian Patent Application Number IN/PCT/2002/1324/CHE
PG Journal Number 17/2008
Publication Date 25-Apr-2008
Grant Date 17-Mar-2008
Date of Filing 22-Aug-2002
Name of Patentee 3M INNOVATIVE PROPERTIES COMPANY
Applicant Address 3M Center P.O. Box 33427 Saint Paul, Minnesota 55133-3427,
Inventors:
# Inventor's Name Inventor's Address
1 KHIEU, Sithya, S P.O. Box 33427 Saint Paul, Minnesota 55133-3427,
2 GILLIGAN, Gregory, E P.O. Box 33427, Saint Paul, MN 55133-3427,
3 BORDEN, Thomas, R P.O. Box 33427, Saint Paul, MN 55133-3427,
PCT International Classification Number E01F 9/06
PCT International Application Number PCT/US2001/005647
PCT International Filing date 2001-02-21
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 60/184, 714 2000-02-24 U.S.A.
2 09/778, 331 2001-02-07 U.S.A.