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:
Aug. 02, 2005
Filed:
Nov. 03, 2003
Applicants:
Andrew J. Ouderkirk, Woodbury, MN (US);
Michael F. Weber, Shoreview, MN (US);
Sanford Cobb, Jr., Lakeland, MN (US);
David L. Wortman, Stillwater, MN (US);
Inventors:
Andrew J. Ouderkirk, Woodbury, MN (US);
Michael F. Weber, Shoreview, MN (US);
Sanford Cobb, Jr., Lakeland, MN (US);
David L. Wortman, Stillwater, MN (US);
Assignee:
3MInnovative Properties Company, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B32B007/02 ; G27B027/00 ; G27B027/10 ; G27B027/28 ;
U.S. Cl.
CPC ...
Abstract
Optical devices according to the present invention include a multilayer optical film in which at least one of the layers comprises an oriented birefringent polymer. The multilayer optical film exhibits low absorptivity and can reflect light approaching at shallow angles as well as normal to the film.