Tobacco smoke filter material and process for production thereof
US5141006A · kind A · utility
5Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1990 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Feb 28, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/14
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Disclosed is a novel process of preparing tobacco smoke filter material, wherein an acidic compound such as citric acid is dissolved in a cellulose acetate spinning solution (dope) prior to spinning the filaments of the filter material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.