Process for the production of tobacco smoke filters
US5150723A · kind A · utility
13Cited by
19References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1990 |
| Grant date | Sep 29, 1992 |
| Priority date | — |
| Expiry date | Jun 8, 2010 |
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 comprising immersing the filter element in a solution of the compound capable of forming the micro acicular crystals, followed by removing the filter element from the solution and removing residual liquid, thereby forming the novel tobacco smoke filter material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.