04025159 is referenced by 345 patents and cites 5 patents.

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.

Title
Cellular retroreflective sheeting
Application Number
5/658284
Publication Number
4025159
Application Date
February 17, 1976
Publication Date
May 24, 1977
Inventor
Joseph M McGrath
Maplewood
MN, US
Agent
Roger R Tamte
Donald M Sell
Cruzan Alexander
Assignee
Minnesota Mining and Manufacturing Company
MN, US
IPC
G02B 5/128
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