Biodegradable cigarette filter
US11918036B2 · kind B2 · utility
0Cited by
72References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2018 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Jan 4, 2043 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/10
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A biodegradable bi-component fiber may include a polyhydroxyalkanoate and/or polylactic acid with cellulose acetate and/or plasticized cellulose acetate for use in a filter material configured for use in a filter of a smoking article. The bi-component fiber may have a sheath-core construction where one component of the bi-component forms the core, and the other component forms the sheath of each fiber. A filter made in accordance with this design may also include non-biodegradable material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.