Smoking article with open ended filter and restrictor
US8235057B2 · kind B2 · utility
4Cited by
146References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2008 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Jul 4, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/043
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A smoking article includes a tobacco rod adapted to produce mainstream smoke, and a filter having an upstream end and a downstream end, wherein the filter is arranged to receive mainstream smoke at the upstream end. The filter includes a tubular segment open at the downstream end thereof and a flow restrictor contained within the tubular segment. The filter is attached to the tobacco rod with tipping paper and includes an air-admissible ventilating zone at a location between the upstream end and the downstream end of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.