Patent · US Expired

Cigarette filter containing dry water and a porphyrin

US6530377B1 · kind B1 · utility

9Cited by

48References

24Claims

0Family size

Assignee

Filligent Limited · CN

Inventors

Craig Lesser · Los Angeles, US
Reid W. von Borstel · Potomac, US

Key dates

Filing date	Nov 20, 2000
Grant date	Mar 11, 2003
Priority date	—
Expiry date	Nov 20, 2020

Classification

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

Abstract

A tobacco smoke filter comprising a porous substrate comprising dry water and a porphyrin dispersed therein. The porous substrate can further comprise microcapsules. The microcapsules can comprise one or more substances selected from the group consisting of chlorophyllin, methylcellulose, sodium pyroglutamate and a vegetable oil. The porous substrate can further comprise sodium pyroglutamate.

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