Smoking articles and smoking materials

US8104484B2 · kind B2 · utility

Assignee

• British American Tobacco (Investments) Limited · GB

Inventors

• Peter Branton · Southampton, GB
• Stephen John Roberts · Kempston, GB
• Elma van der Lingen · Johannesburg, ZA

Key dates

• Filing date: May 24, 2005
• Grant date: Jan 31, 2012
• Expiry date: Jul 23, 2027

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A23V2002/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A smoking article such as a cigarette, or a smoke filter or other component thereof, comprises a catalyst for the oxidation of carbon monoxide to carbon dioxide. The catalyst comprises gold, and an oxide of zinc or titanium. Titania and mixed oxides of zinc and copper or aluminum are preferred (TiO2, ZnO, ZnAlOx or CuZnOx). The gold preferably comprises species in the metallic state)(Au0), together with species in an oxidized state (Auδ+).