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:
May. 10, 2011
Filed:
May. 17, 2007
Charles A. Marttila, Shoreview, MN (US);
Charles D. Hoyle, Stillwater, MN (US);
David A. Ender, New Richmond, WI (US);
Jaime B. Willoughby, Hugo, MN (US);
Robert J. Devoe, Minneapolis, MN (US);
Charles A. Marttila, Shoreview, MN (US);
Charles D. Hoyle, Stillwater, MN (US);
David A. Ender, New Richmond, WI (US);
Jaime B. Willoughby, Hugo, MN (US);
Robert J. DeVoe, Minneapolis, MN (US);
3M Innovative Properties Company, Saint Paul, MN (US);
Abstract
A process comprises imagewise exposing at least a portion of a photoreactive composition to light sufficient to cause simultaneous absorption of at least two photons/thereby inducing at least one acid- or radical-initiated chemical reaction where the composition is exposed to the light, the imagewise exposing being carried out in a pattern that is effective to define at least the surface of a plurality of light extraction structures. Each one of the array of light extraction structures has at least one shape factor; the shape factor may vary across the array. At least one light extraction structure may have the geometric configuration of a truncated asphere.