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Abrasive Toothpaste Patented by Alcan



Published November 15, 2005
Related Searches: patent international
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Patent No. US 6,682,717 B1: Alcan International Ltd., Montreal, Canada, patented an abrasive toothpaste with alumina particles that are at least 90% α-alumina calcined at a temperature of at least 900° C.


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