Minnesota Mining and Manufacturing Company

3m Innovative Properties Company

Charles J Studiner, Iii

Thomas P Klun

Scott R Culler

William A Hendrickson

Kathryn M Spurgeon

Kimberly K Harmon

Gary L Holmes

Robert V Heiti

David H Hardy

Matthew H Frey

Kenton D Budd

Stephen B Roscoe

Chikafumi Yokoyama

John E Bailey

Toshihro Kasai

The present invention relates to transparent microspheres (i.e., beads) that impart yellow color to retroreflected light. The microsphere preferably comprise titania plus alumina, zirconia, and/or silica and iron oxide, manganese oxide, or mixtures thereof. More particularly, the present invention relates to fused microspheres that impart yellow color to retroreflected light having both transparency and mechanical properties suitable, for example, for lens elements in retroreflective articles.

Glass-ceramic microspheres that impart yellow color to retroreflected light

Precisely shaped abrasive composites are disclosed. The abrasive composites comprise from 20 to 75 percent by weight at a plurality of abrasive grits and a binder.

Precisely shaped abrasive composite

Precisely shaped composites and methods for making these composites are disclosed. The method of this invention comprises the steps of:

Method of making a coated abrasive article comprising precisely shaped

Precisely shaped particles and method of making the same

Abrasive articles comprising precisely shaped particles are disclosed. The particles are bonded together to form a shaped mass, e.g., a wheel; alternatively, the particles can be bonded to a backing to form a coated abrasive article; or the particles can be bonded into a fibrous, nonwoven substrate to form a non-woven abrasive article.

Abrasive articles comprising precisely shaped particles

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Oakdale, MN, United States of America

Charles J Studiner, Iii