Carbon dioxide impregnation of tobacco by super cooling
US4250898A · kind A · utility
18Cited by
0References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1978 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Oct 13, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24B3/185
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A process for impregnating tobacco with carbon dioxide is provided. The process comprises: (a) contacting tobacco with carbon dioxide gas at relatively low pressure (b) rapidly cooling the tobacco-carbon dioxide system until the carbon dioxide condenses as liquid or solid within the tobacco and finally solidifies, and (c) releasing the pressure in the cooled system. Thereafter, the carbon dioxide-treated tobacco may be expanded conventionally, such as by subjecting it to heating conditions effective to liberate the carbon dioxide therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.