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:
Dec. 23, 2008
Filed:
Oct. 14, 2005
Graham M. Clarke, Woodbury, MN (US);
Paul D. Graham, Woodbury, MN (US);
Brent R. Hansen, New Richmond, WI (US);
Travis B. Hoium, Moorhead, MN (US);
David F. Slama, Grant, MN (US);
Graham M. Clarke, Woodbury, MN (US);
Paul D. Graham, Woodbury, MN (US);
Brent R. Hansen, New Richmond, WI (US);
Travis B. Hoium, Moorhead, MN (US);
David F. Slama, Grant, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The present invention pertains to privacy film that can be used with documents. The privacy film has a light transmissive, polymeric base sheet that has opposing first and second surfaces. A plurality of light directing elements protrudes from the first surface of the base sheet. The base sheet can be constructed of a first polymeric material. The light directing elements can be constructed of a second polymeric material. The first and second polymeric material may be the same material. The light directing elements are substantially constant in its cross-section dimension and disposed substantially parallel to each other.