Smoking articles with significantly reduced gas vapor phase smoking constituents
US9138016B2 · kind B2 · utility
1Cited by
154References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2011 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Feb 3, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/045
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A smoking article having a tobacco rod, which is adapted to produce mainstream smoke, and a filter attached to said tobacco rod. A permeable wrapping paper circumscribes the tobacco rod and the filter. The filter has an upstream end portion and a downstream end portion, and includes a flow restricting segment of smoke impermeable material, which includes at least one open flow passage therethrough to deliver mainstream smoke, and a cavity downstream of the flow restricting segment. The smoking article also includes at least one ventilation zone upstream of the flow restricting segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.