Patent · US Active

Filter materials and filters made therefrom

US10798966B2 · kind B2 · utility

0Cited by

8References

14Claims

0Family size

Assignee

British American Tobacco (Investments) Limited · GB

Inventors

Yahia Lemmouchi · London, GB
Andrew E. Davis · London, GB
Barry DIMMICK · London, GB
Martin Dauner · Köngen, DE
Christoph Rieger · Schriesheim, DE
Andreas Ullrich · Eßlingen, DE

Key dates

Filing date	Jan 21, 2015
Grant date	Oct 13, 2020
Priority date	—
Expiry date	Jan 1, 2036

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D39/18
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to filter material for inclusion in a smoking article, said filter material comprising a base material comprising or made from fibers having a first diameter or mean diameter, and fine fibers having a diameter or mean diameter which is smaller than the first diameter, wherein the filter material comprises more than 10% by weight and/or by volume fine fibers or wherein the diameter or mean diameter of the fine fibers is between about 1.0 μm and about 1.5 μm. The invention also relates to filters or filter elements comprising the filter material, smoking articles comprising the same, and use of the filter material in smoke filtration.

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