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:
Sep. 04, 2018
Filed:
Dec. 18, 2015
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Stephen A. Johnson, Woodbury, MN (US);
Ryan T. Fabick, Shoreview, MN (US);
Edward J. Kivel, Stillwater, MN (US);
Victor Ho, St. Paul, MN (US);
Benjamin J. Bending, Madison, WI (US);
Christopher W. A. Krohe, Minneapolis, MN (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); G02B 1/04 (2006.01); C08J 5/18 (2006.01); G02B 1/08 (2006.01); B32B 27/08 (2006.01); G02B 27/28 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3083 (2013.01); B32B 27/08 (2013.01); C08J 5/18 (2013.01); G02B 1/04 (2013.01); G02B 1/08 (2013.01); C08J 2333/12 (2013.01); C08J 2367/02 (2013.01); G02B 27/28 (2013.01);
Abstract
A birefringent polyester film includes naphthalate units, ethylene units, a titanate compound, a planar branching unit, and 1 to 80 ppm metal content. The birefringent polyester film has an out-of-plane birefringence of at least 0.1 at 633 nm.