Smoking article with single piece restrictor and chamber
US8424539B2 · kind B2 · utility
38Cited by
147References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2007 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Apr 6, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/043
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A smoking article having a filter segment that establishes both a desired resistance to draw and a mixing of mainstream smoke with ventilation air. The filter segment includes a fluted portion, a frusto-conical portion and axially extending orifices establishing fluid communication between the frusto-conical portion and voids between one or more walls of the fluted portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.