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:
Jun. 18, 2013
Filed:
Jul. 01, 2009
Ta-hua Yu, Woodbury, MN (US);
Timothy J. Hebrink, Scandia, MN (US);
Yufeng Liu, Woodbury, MN (US);
Edward J. Kivel, Stillwater, MN (US);
Daniel M. Czuprynski, Hudson, WI (US);
James A. Klein, Minneapolis, MN (US);
Ta-Hua Yu, Woodbury, MN (US);
Timothy J. Hebrink, Scandia, MN (US);
Yufeng Liu, Woodbury, MN (US);
Edward J. Kivel, Stillwater, MN (US);
Daniel M. Czuprynski, Hudson, WI (US);
James A. Klein, Minneapolis, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Presently described are multilayer optical films comprising an optical stack comprising at least one first birefringent optical layer; at least one (e.g. isotropic) second optical layer having a birefringence of less than 0.04 at 633 nm, and optionally at least one skin layer. The second layer, skin layer, or a combination thereof comprises a blend of at least one methyl methacrylate polymer and at least one styrene-acrylonitrile polymer.