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:
Jan. 28, 2020
Filed:
Apr. 30, 2015
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Ying Xia, Woodbury, MN (US);
Shri Niwas, Maple Grove, MN (US);
Michael A. McCoy, Minneapolis, MN (US);
Yongshang Lu, Woodbury, MN (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/12 (2006.01); G02B 5/128 (2006.01); A41D 13/01 (2006.01); A41D 27/08 (2006.01); B32B 37/12 (2006.01); G02B 1/04 (2006.01);
U.S. Cl.
CPC ...
G02B 5/128 (2013.01); A41D 13/01 (2013.01); A41D 27/085 (2013.01); B32B 37/12 (2013.01); G02B 1/04 (2013.01); B32B 2305/18 (2013.01); B32B 2551/00 (2013.01);
Abstract
Retroreflective articles include a layer of optical elements, and a bead bond layer (). The optical elements include transparent microspheres (), a transparent polymeric polyurethane layer (), and at least one reflective layer (), where the transparent polymeric polyurethane layer () comprises a dried layer prepared from an aqueous polyurethane dispersion. The retroreflective articles have improved wash durability.