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:
Feb. 21, 2012
Filed:
Sep. 19, 2007
James P. Endle, New Richmond, WI (US);
Christopher S. Lyons, St. Paul, MN (US);
Douglas S. Dunn, Maplewood, MN (US);
Robert J. Devoe, Minneapolis, MN (US);
James M. Jonza, Woodbury, MN (US);
Stephen P. Maki, North St. Paul, MN (US);
Albert I. Everaerts, Oakdale, MN (US);
George G. I. Moore, Afton, MN (US);
Robin E. Wright, Inver Grove Heights, MN (US);
Mark A. Roehrig, Stillwater, MN (US);
Olester Benson, Jr., Woodbury, MN (US);
James P. Endle, New Richmond, WI (US);
Christopher S. Lyons, St. Paul, MN (US);
Douglas S. Dunn, Maplewood, MN (US);
Robert J. Devoe, Minneapolis, MN (US);
James M. Jonza, Woodbury, MN (US);
Stephen P. Maki, North St. Paul, MN (US);
Albert I. Everaerts, Oakdale, MN (US);
George G. I. Moore, Afton, MN (US);
Robin E. Wright, Inver Grove Heights, MN (US);
Mark A. Roehrig, Stillwater, MN (US);
Olester Benson, Jr., Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A method for forming a color shifting film on a support, the film comprising a reflective stack disposed adjacent to the support and an image is disclosed. The reflective stack comprises an at least partially transparent spacer layer comprising a substituted acrylamide polymer disposed between a partially reflective first layer and a reflective second layer. The acrylamide layer has a thickness sufficient to produce an interference color.