Smoking article filter having liquid additive containing tubes therein
US8113215B2 · kind B2 · utility
35Cited by
78References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2008 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Aug 4, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/061
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Provided are filters including at least one impervious additive containing tube. A barrier, such as a liquid barrier, seals each end of the tube so as to contain additives, such as a liquid additive, within the additive containing tube. The one or more additive containing tubes are inserted into filters for smoking articles. Drawing action during a puff causes breach of the barrier and release of the additive into the surrounding filter material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.