Cigarette filter having low visible staining
US4693265A · kind A · utility
8Cited by
7References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1986 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | May 19, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/043
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Filter cigarettes exhibiting a low amount of visible staining have a tobacco rod, an axially aligned filter element having a barrier region positioned on the back face thereof such that air and smoke traveling through the filter element exits the filter element towards the periphery thereof, and an axially aligned tubular mouthpiece element positioned in a spaced apart relationship with the filter element such that air and smoke exiting the filter element travels through the path of least resistance provided by the spaced apart region and the hollow region of the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.