The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2014
Filed:
Oct. 22, 2009
Kenneth L. Smith, White Bear Lake, MN (US);
James R. Imbertson, Maplewood, MN (US);
John C. Kelliher, Oakdale, MN (US);
John A. Worrell, Hudson, WI (US);
Sidney A. Ellingstad, Eau Claire, WI (US);
Kenneth L. Smith, White Bear Lake, MN (US);
James R. Imbertson, Maplewood, MN (US);
John C. Kelliher, Oakdale, MN (US);
John A. Worrell, Hudson, WI (US);
Sidney A. Ellingstad, Eau Claire, WI (US);
3M Innovative Properties Company, Saint Paul, MN (US);
Abstract
The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.