Filters including segmented monolithic sorbent for gas-phase filtration
US6814786B1 · kind B1 · utility
52Cited by
65References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2003 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Apr 2, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/17
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A filter includes at least two monolithic sorbent segments and a mixing segment between the two monolithic sorbent segments. The monolithic sorbent segments comprise porous sorbent materials that are capable of selectively removing one or more selected gaseous constituents from a gas flow. The filter can be incorporated in a smoking article, such as a cigarette, to remove one or more selected constituents from mainstream smoke. Methods for making the filter and smoking articles including the filter, as well as methods for smoking a cigarette comprising the filter, are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.