Invention Grant
- Patent Title: Filter
- Patent Title (中): 过滤
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Application No.: US12669463Application Date: 2008-06-27
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Publication No.: US08550092B2Publication Date: 2013-10-08
- Inventor: John Roger Sampson , David Lewis
- Applicant: John Roger Sampson , David Lewis
- Applicant Address: GB London
- Assignee: British American Tobacco (Investments) Limited
- Current Assignee: British American Tobacco (Investments) Limited
- Current Assignee Address: GB London
- Agency: NW Poulsen
- Priority: GB0713905.8 20070717
- International Application: PCT/EP2008/058332 WO 20080627
- International Announcement: WO2009/010380 WO 20090122
- Main IPC: A24D3/04
- IPC: A24D3/04
Abstract:
A filter for a cigarette comprises a porous filter rod (3) a material sheet (2) wrapped around the filter rod and a cellulose acetate thread (4) formed from substantially uncrimped cellulose acetate filaments. The cellulose acetate thread is positioned within the filter rod and extends along the central axis of the filter rod.
Public/Granted literature
- US20100294288A1 Filter Public/Granted day:2010-11-25
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