Smoking article with valved restrictor
US8424540B2 · kind B2 · utility
10Cited by
147References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2009 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Apr 4, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/045
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A smoking article filter includes a valved flow restrictor and a cavity downstream of the flow restrictor. The flow restrictor includes an orifice or flow channel for directing smoke into the cavity. The filter is attached to the tobacco rod with tipping paper and includes an air-admissible ventilating zone at a location downstream of the restrictor. The valved restrictor can be used to isolate a sorbent bearing component of the filter from a flavor bearing component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.