Cigarette filter

US4171705A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Arno Holst
• Michael Kostrzewa · Wiesbaden, DE
• Helmut Lask · Wiesbaden, DE

Key dates

• Filing date: Dec 17, 1976
• Grant date: Oct 23, 1979
• Expiry date: Dec 17, 1996

Classification

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

Abstract

This invention relates to a cigarette filter of cellulosic material composed at least partially of modified cellulose modified with at least one fatty acid group containing at least 14 carbon atoms in the molecule selected from the group consisting of a complex compound of a fatty acid containing basic chromium chloride and a melamine resin precondensate containing a fatty acid group.