Patent · US Active

Impermeable bead in hollow cigarette filter tube

US10342254B2 · kind B2 · utility

1Cited by

2References

14Claims

0Family size

Assignee

Philip Morris Products S.A. · CH

Inventors

Leonardo Nappi · Hauterive, CH
Clement Besso · Neuchâtel, CH

Key dates

Filing date	Dec 17, 2013
Grant date	Jul 9, 2019
Priority date	—
Expiry date	Dec 17, 2033

Classification

Technology area (CPC A)Human Necessities
CPC primaryA24D3/045
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

There is provided a filter for a smoking article, the filter including a hollow tube of filter material having an outer diameter and an inner diameter. The filter further includes a flow restrictor disposed in the hollow tube. At least one cross sectional dimension of the flow restrictor is larger than the inner diameter of the hollow tube, such that the flow restrictor engages with the hollow tube to retain the flow restrictor in the hollow tube. There is also provided a smoking article including such a filter.

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