Filter material for reducing harmful substances in tobacco smoke

US6591839B2 · kind B2 · utility

Inventors

• Dieter Meyer · Wolfsburg, DE
• Hans-Peter Braun · Sulz am Neckar, DE

Key dates

• Filing date: Mar 28, 2001
• Grant date: Jul 15, 2003
• Expiry date: Jan 22, 2022

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A24D3/10
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A filter material for reducing the content of harmful substances in tobacco smoke. The filter material comprises a ground and not additionally activated expanded clay produced without adding foreign substances, and zeolite as the filter material. The filter is suitable for tobacco products such as cigarettes, cigars and cigarillos, and for smoking articles such as tobacco pipes and cigarette and cigar holders.