Patent · US Expired

Filter for cigarettes, cigarillos or pipes

US4194517A · kind A · utility

10Cited by

4References

17Claims

0Family size

Assignee

B.A.T. Cigarettenfabriken GmbH · DE

Inventor

Horst Borowski · Hamburg, DE

Key dates

Filing date	Sep 28, 1977
Grant date	Mar 25, 1980
Priority date	—
Expiry date	Sep 28, 1997

Classification

Technology area (CPC A)Human Necessities
CPC primaryA24D3/14
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

An improved fibrous filter is disclosed which is useful for removing harmful chemicals from tobacco smoke. This filter is characterized as containing at least one compound selected from the group consisting of ##STR1## wherein R represents a straight-chain, branched or cyclic aliphatic hydrocarbon radical.

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