High total denier cellulose acetate tow for hollow filters and non-wrapped filters
US11785983B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2019 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Oct 19, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/17
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Disclosed are cellulose acetate tows, bales, and filter rods having at least 3 denier per filament and at least 50,000 total denier, or at least 6 denier per filament and at least 40,000 total denier, for use as hollow filters, non-wrapped filters, or combinations thereof, in smoking devices and aerosol-generating devices, such as an electrically heated cigarette. The cellulose acetate tow may comprise at least 3-6 denier per filament and may have a total denier of at least 50,000 to 100,000. The cellulose acetate tow comprises at least 6-12 denier per filament and may have a total denier of at least 40,000 to 90,000. The hollow filter may comprise a non-wrapped cellulose acetate hollow filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.