Patent ID: 7874296

Claim:
A cigarette gas filter comprising: a cylindrical inner piece, a cylindrical outer piece, and a spacer, wherein the said cylindrical inner piece and the said cylindrical outer piece are concentric cylindrical pieces put together by the said spacer to form a narrow annular air gap, wherein the said cylindrical outer piece comprises a permeable paper, and the said cigarette gas filter is adapted with a cigarette, so that once the cigarette is smoked by a user; it makes the mainstream smoke to pass through the said narrow annular gap, wherein the smoke is drawn through the said narrow annular gap by the inhalation of the user, wherein air is drawn into the said narrow annular gap through the permeable paper to reduce the fraction of gases present in the smoke; wherein the said permeable paper comprises cellulose or other disposable materials: wherein the said permeable paper further comprising chemicals and additives: wherein the said permeable paper is partially or totally perforated: wherein the said cigarette comprises a burning part, wherein the said cigarette gas fitter surrounds the said burning part of a cigarette to make a filtered cigarette.