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US 8,573,789 B2Granted
Retroreflective sheeting including cube corner elements
Assignee3M Innovative Properties Company
InventorKenneth L. Smith
Life of this patent
Estimating the term…
Abstract
The present disclosure is directed to lamina(e) comprising cube corner elements, a tool comprising an assembly of laminae and replicas thereof. The disclosure further relates to retroreflective sheeting.
Claims15
Retroreflective sheeting, comprising:
- a row of preferred geometry cube corner elements having faces defined by a side groove set;
- wherein at least two grooves within the set are nonparallel by amounts ranging from less than about 1 degree to greater than the degree of precision of the manufacturing process.
Dependencies are inferred from the claim text.