Cigarette filter
US8256434B2 · kind B2 · utility
1Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2010 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Aug 11, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/068
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention concerns an at least partially transparent cigarette filter tipping film comprising a biodegradable substrate, and softener in an amount of less than 25% by weight of the biodegradable substrate, and a cigarette filter comprising a filtration material encased in a cylinder of the said tipping film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.