Ventilated tobacco smoke filter
US4774972A · kind A · utility
5Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1986 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Mar 31, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/043
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tobacco smoke filter having a non-integral core of components [2, 3] joined and held in longitudinal alignment by a strip [1] which extends only partially around the core circumference to leave a gap [7] extending longitudinally of the core between the longitudinal edges [8] of the strip, and an outer wrap [5] which engages fully around the core and strip and provides--e.g. via perforations [9]--for the lateral ingress of external ventilating air therethrough and through the longitudinal gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.