Tobacco smoke filters and process for production thereof
US4964426A · kind A · utility
25Cited by
19References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1988 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Sep 28, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Disclosed is a novel tobacco smoke filter material comprising a filter element such as cellulose acetate crimped tow having at least about 1 weight percent of micro acicular crystals of a compound such as sodium carbonate present on the surfaces of the filter element. Also disclosed is a process for preparation of such tobacco smoke filter material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.