Lightweight cigarette filter and cigarettes incorporating such filters
US5415189A · kind A · utility
11Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1992 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Oct 22, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A lightweight cigarette filter including a filter element containing filter material having a total Denier of less than 35,000 or a bulk density of less than 0.12 gcm.sup.-3 in which part of the volume of the filter is occupied by a space filler impervious to smoke flow therethrough and the bulk density of which is less than the bulk density of the equivalent amount of filter material which it replaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.