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:
Feb. 26, 2019
Filed:
Apr. 24, 2015
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Ruby Chakraborty, Woodbury, MN (US);
Cheryl L. S. Elsbernd, Woodbury, MN (US);
Shri Niwas, Maple Grove, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/128 (2006.01); B29D 11/00 (2006.01); G02B 1/14 (2015.01); B29K 101/12 (2006.01); B29K 509/08 (2006.01);
U.S. Cl.
CPC ...
G02B 5/128 (2013.01); B29D 11/00605 (2013.01); G02B 1/14 (2015.01); B29K 2101/12 (2013.01); B29K 2509/08 (2013.01);
Abstract
Retroreflective articles include transparent microspheres () protruding from a bead bond layer (), with reflective metal layers () coated on a portion of the transparent microspheres. Retroreflective articles with anti-staining properties have bead bond layers that contain one or more corrosion inhibiting compounds. At least a portion of the one or more corrosion inhibiting compounds migrates through the reflective metal layer to passivate the exposed metal surface of the reflective metal layer.