Method and preparation for the photochromic marking and/or for securing the authenticity of objects

US6616964B1 · kind B1 · utility

Assignee

• Norbert Hampp · DE

Inventors

• Norbert Hampp · Hersbruck, DE
• Arne Seitz · Marburg, DE

Key dates

• Filing date: Jan 8, 2002
• Grant date: Sep 9, 2003
• Expiry date: Jan 8, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B61/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Method and preparation for the photochromic labeling and/or for protecting the authenticity of objects, in which bacteriorhodopsin materials and preparations therefrom are used for application to the objects; preference is given to using a combination of low-level and high-level security features in said bacteriorhodopsin materials and preparations therefrom.