Filter cigarette
US5178166A · kind A · utility
29Cited by
28References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1990 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Sep 20, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/043
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A filter cigarette comprising a tobacco rod and filter portion comprising a fluted tubular extrusion. The flutes are blocked intermediate the rod end and mouth end of the extrusion. The tobacco rod is circumferentially wrapped with a porous wrapper comprising a longitudinal band of perforations. The fluted tubular extrusion is attached with tipping paper to the tobacco rod. A mouthband and a rodband of perforations circumscribes the tipping paper. A rod of charcoal-impregnated filter material may abut the tubular extrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.