Method for manufacturing a glass tube semi-finished product or a hollow glass product made therefrom with markings, and uses of the same

US11872188B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• André Witzmann · Waldershof, DE
• Ulla Trinks · Mitterteich, DE
• Reinhard Mannl · Mitterteich, DE

Key dates

• Filing date: Dec 8, 2017
• Grant date: Jan 16, 2024
• Expiry date: Jun 5, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2218/119
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass tube semi-finished product or a hollow glass product manufactured from the glass tube semi-finished product is provided with a first marking with information regarding origin and manufacture of the glass tube semi-finished product and a second marking, the information of which second marking is linked to the information of the first marking, so as to enable a determination regarding authenticity of the glass tube semi-finished product, origin of the glass tube semi-finished product, and/or origin of an apparatus with which the first and/or second marking was generated on the glass tube semi-finished product. The first marking is a marking that is produced at temperatures above the transformation temperature of the glass in a counterfeit-proof manner. The combination of two markings provides a high level of protection against counterfeiting.