Method for the identification of plastics

US5329127A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Arno Becker
• Klaus Luttermann · Lohmar, DE
• Uwe Claussen · Leverkusen, DE
• Peter Orth · Neunburg vorm Wald, DE
• Ludger Heiliger · Leverkusen, DE
• Aziz E. Sayed · Leverkusen, DE

Key dates

• Filing date: Apr 12, 1993
• Grant date: Jul 12, 1994
• Expiry date: Apr 12, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of identifying different plastics, wherein each plastic is provided with a plurality of fluorescent dyes which differ in terms of their emission frequencies and/or in terms of the duration of their fluorescence, so that a fluorescence pattern, which is distinguished by the duration of the fluorescence and/or by the frequencies occurring, can unambiguously be assigned to each plastic.