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:
Apr. 12, 2022
Filed:
Sep. 27, 2017
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
John A. Wheatley, Stillwater, MN (US);
Michael A. McCoy, St. Paul, MN (US);
Tien Yi T. H. Whiting, St. Paul, MN (US);
Guanglei Du, Painted Post, NY (US);
Neeraj Sharma, Lake Elmo, MN (US);
Kui Chen-Ho, Woodbury, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); G02B 27/28 (2006.01); G02B 5/124 (2006.01);
U.S. Cl.
CPC ...
G02B 5/124 (2013.01); G02B 5/3016 (2013.01); G02B 27/286 (2013.01);
Abstract
Retroreflecting articles are described. In particular, retroreflecting articles including a quarter wave retarder and a retroreflecting layer are described. The retarder is rotationally invariant and the retroreflecting layer is non-depolarizing. Such articles may be useful for sensor-detectable signs, labels, and garments.