Coated impregnated porous filter plug
US8402978B2 · kind B2 · utility
37Cited by
17References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2009 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Feb 26, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/17
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A process for producing a coated filter plug for a smoking article including: (a) incorporating an additive to a porous filter plug, thereby obtaining an impregnated filter plug; (b) coating a surface of the impregnated filter plug with a cross-linkable polymer material; and (c) cross-linking the cross-linkable polymer material, to form a cross-linked, breakable coating substantially enclosing the impregnated filter plug. The process may further include at least partially coating the impregnated filter plug with a cross-linking agent prior to, or subsequent to, coating with the cross-linkable polymer material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.