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:
Mar. 18, 2025
Filed:
Feb. 13, 2024
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Adam D. Haag, Woodbury, MN (US);
Michael A. Johnson, Stillwater, MN (US);
Michelle L. Toy, North St. Paul, MN (US);
Brianna N. Wheeler, Bloomington, MN (US);
David T. Yust, Woodbury, MN (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); B32B 7/023 (2019.01); B32B 7/03 (2019.01); B32B 7/06 (2019.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01); B32B 38/10 (2006.01); B32B 38/14 (2006.01); B32B 38/16 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3041 (2013.01); B32B 7/023 (2019.01); B32B 7/03 (2019.01); B32B 7/06 (2013.01); B32B 27/08 (2013.01); B32B 27/306 (2013.01); B32B 27/36 (2013.01); B32B 38/10 (2013.01); B32B 38/14 (2013.01); G02B 5/3016 (2013.01); B32B 2250/02 (2013.01); B32B 2250/24 (2013.01); B32B 2255/10 (2013.01); B32B 2307/4026 (2013.01); B32B 2307/42 (2013.01); B32B 2307/422 (2013.01); B32B 2329/04 (2013.01); B32B 2367/00 (2013.01); B32B 2551/00 (2013.01);
Abstract
A film stack includes co-stretched first and second layers. The first layer is stained with iodine and has a glass transition temperature of at least 5° C. greater than a glass transition temperature of the second layer. The second layer has in-plane birefringence of less than 0.02 and a retardance of less than 100 nm.