Patent · US Active

Smoking article filters

US9185935B2 · kind B2 · utility

6Cited by

1References

17Claims

0Family size

Assignee

British American Tobacco (Investments) Limited · GB

Inventors

David L. Lewis · London, GB
Andrew E. Davis · London, GB
John Richardson · Oklahoma City, US
John Major · Pleasant Grove, US
John Sampson · London, GB

Key dates

Filing date	May 2, 2013
Grant date	Nov 17, 2015
Priority date	—
Expiry date	May 2, 2033

Classification

Technology area (CPC A)Human Necessities
CPC primaryA24D3/16
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The present invention relates to improvements in filters for use in smoking articles such as cigarettes, cigars and cigarillos. The improvements, particularly but not exclusively, relate to filter capabilities and to the manufacture of such filters. In one example, a filter for a smoking article comprises randomly oriented discrete short length fibres of absorbent having adsorbent particles dispersed therein. The invention also provides a filter for a smoking article comprising various other filter arrangements including absorbent and/or adsorbent materials.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.