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. 05, 2019
Filed:
Nov. 06, 2017
3m Innovative Properties Company, St. Paul, MN (US);
Alan B. Campbell, Santa Rosa, CA (US);
Dale L. Ehnes, Cotati, CA (US);
John F. Van Derlofske, III, Minneapolis, MN (US);
Mark R. Dupre, Oakdale, MN (US);
Stephen J. Dreyer, North Saint Paul, MN (US);
Patrick H. Marushin, Sartell, MN (US);
Todd M. Johnson, Saint Paul, MN (US);
Bryan V. Hunt, Anoka, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A light directing film includes a structured major surface with a plurality of microstructures extending along a first direction. Each microstructure has a first region and a second region different from the first region, a substantially constant height in the first region and a non-constant maximum height in the second region greater than the substantially constant height in the first region, and a same lateral cross sectional shape in the first region and the second region.