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:
Oct. 08, 2013
Filed:
May. 25, 2010
Louis S. Moren, Mahtomedi, MN (US);
Brian G. Koethe, Cottage Grove, MN (US);
Ernest L. Thurber, Somerset, WI (US);
Louis S. Moren, Mahtomedi, MN (US);
Brian G. Koethe, Cottage Grove, MN (US);
Ernest L. Thurber, Somerset, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Disclosed is a method of applying particles to a coated backing. A first layer of particles is created over a second layer of particles on a support surface and the first layer of particles is different in at least one property from the second layer of particles. A coated backing is positioned above the first and second layer of particles. An electrostatic field is applied simultaneously to the first and second layer of particles such that the first layer of particles closer to the coated backing are preferentially attracted to the coated backing first before the second layer of particles.