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US 12,479,067 B2Granted
Patterned abrasive substrate and method
Assignee3M Innovative Properties Company
InventorsJoseph B. Eckel, Aaron K. Nienaber, Thomas J. Nelson, Ann M. Hawkins, Amelia W. Koenig
Life of this patent
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Abstract
Abrasive articles and associated methods are shown that include abrasive particles arranged in one or more symbols on a backing substrate. Examples include shaped abrasive particles arranged into one or more symbols. Other examples include one or more wear particles with a height less than other abrasive particles, such that when exposed, the wear particles indicate a wear condition of the abrasive article.
Claims13
An abrasive article, comprising:
- a backing substrate;
- a plurality of particles on the backing substrate adhered to the backing substrate by a make coat, including;
- a plurality of shaped ceramic abrasive particles consisting essentially of sintered alpha alumina;
- a plurality of wear indicating particles having a height that is less than a height of the plurality of shaped ceramic abrasive particles, wherein when exposed, the plurality of wear indicating particles are configured to communicate an end of product life to a user, wherein the plurality of wear indicating particles are colored differently from the plurality of shaped ceramic abrasive particles and are positioned on the backing to form one or more symbols;
- and
- a concealing layer,
- wherein when the abrasive article is new, the plurality of wear indicating particles are hidden from view by the concealing layer and portions of the plurality of shaped ceramic abrasive particles are visible above the concealing layer.
4 more elements
Dependencies are inferred from the claim text.