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US 8,142,891 B2Granted
Dish-shaped abrasive particles with a recessed surface
Assignee3M Innovative Properties Company
InventorsScott R. Culler, Dwight D. Erickson, Negus B. Adefris, John T. Boden, John D. Haas
Life of this patent
Estimating the term…
Abstract
Abrasive particles comprising dish-shaped abrasive particles each having a sidewall; each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, t; and wherein either the first face or the second face is recessed or concave.
Claims20
Abrasive particles comprising:
- dish-shaped abrasive particles each having a sidewall, each of the dish-shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall having a varying thickness, T;
- wherein the first face is recessed and a thickness ratio of Tc/Ti for the dish-shaped abrasive particles is between 1.25 to 5.00;
- and a draft angle α between the second face and the sidewall and wherein the draft angle α is between about 95 degrees to about 130 degrees.
Abrasive particles comprising:
- dish-shaped abrasive particles each having a sidewall, each of the dish-shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, T, and wherein the first face is convex and the second face is concave;
- and wherein a perimeter of the first face and a perimeter of the second face comprises a triangular shape.
Abrasive particles comprising:
- dish-shaped abrasive particles each having a sidewall, each of the dish-shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall having a varying thickness, T, and wherein the first face is recessed and the second face is recessed;
- and wherein a perimeter of the first face and a perimeter of the second face comprises a triangular shape.
Dependencies are inferred from the claim text.