Cigarettes
US4691717A · kind A · utility
48Cited by
3References
56Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 30, 1984 |
| Grant date | Sep 8, 1987 |
| Priority date | — |
| Expiry date | Aug 30, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H5/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The core of a cigarette is covered with a sheath made of material which does not generate any appreciable amount of smoke when the cigarette is sucked but burns when the cigarette is sucked. The material is made of starch, agar, gelatin or a mixture thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.