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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.:

US 12253701 B1

PDFFull Text
Date of Patent:
Mar. 18, 2025

Filed:

Feb. 13, 2024

Film stacks for thin circular polarizers

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:

Clifton F. Richardson

Primary Examiner:

Joseph L Williams

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.

Find Patent Forward Citations

Haag, Adam. (2025). Film stacks for thin circular polarizers (U.S. Patent No. 12253701). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12253701

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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