Filter for a cigarette and filter cigarette
US6422244B1 · kind B1 · utility
4Cited by
3References
14Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 24, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Jul 24, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/043
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A filter for a cigarette and a filter cigarette which make a smoking feeling much milder without the original cigarette taste and aroma being spoiled are provided. The cigarette filter has a filter rod 8 having an air permeable peripheral surface, and 3 to 12 axial passages 12 in the rod 8. These passages 12 are distributed on a ring having a diameter of 50 to 70% of that of the rod and have a diameter of 0.1 to 0.7 mm. The wall of the axial passages 12 have air permeability. In smoking, ventilation air introduced into the passages 12 dilutes the smoke stream from the cigarette.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.