Abrasive grain with main surfaces and subsidiary surfaces

US10557068B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Moritz Oldenkotte · Konstanz, DE
• Georg Hejtmann · Mundelsheim, DE
• Gert Lindemann · Lichtenstein, DE
• Stefan Fuenfschilling · Rielasingen-Worblingen, DE
• Petra Stedile · Eßlingen, DE
• Adrian Jenni · Sankt Gallen, CH
• Tony Pleschinger · Moscow, RU

Key dates

• Filing date: Aug 9, 2017
• Grant date: Feb 11, 2020
• Expiry date: Oct 26, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/94
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An abrasive grain includes a surface having at least a first face with a first outline, and at least one second face with a second outline. The first outline does not contain any vertices, but the second outline contains at least one vertex. The abrasive grain may include a ceramic material, especially polycrystalline α-Al2O3.