Use of hydride-containing aluminum oxide for producing optically detectable markings and inscriptions

US6187390A · kind A · utility

Assignee

• BASF SE

Inventors

• Oliver Seeger · Mannheim, DE
• Stefan Faber · Friedberg, DE
• Michael Veith · Sankt Ingbert, DE
• Eckehard Fritscher · Pirmasens, DE
• Wilma M. Dausch · Schifferstadt, DE
• Raimund Schmid · Neustadt, DE

Key dates

• Filing date: Jun 16, 1999
• Grant date: Feb 13, 2001
• Expiry date: Jun 16, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G09F3/00
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The invention concerns the use of hydride-containing aluminium oxide for producing optically detectable markings and inscriptions.