Method for producing a tobacco filter material
US6344239B1 · kind B1 · utility
28Cited by
20References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1998 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | Oct 20, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2965
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method for producing a tobacco filter material which is either (A) a coating process for coating the surface of a fibrous or particulate cellulose with a cellulose ester having an average substitution degree of about 2.0 to about 2.6 to give a coated cellulose, and wet webbing the coated cellulose into a sheet, or (B) a treating process for treating a naturally-occurring or regenerated cellulose fiber or particle with an organic acid and an organic acid anhydride or organic acid halide in a liquid phase to give a cellulose derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.