Class 131/228 - With sleeve or cap

Subclass of Class 131 - Tobacco
Definition: Smoking devices having a sleeve or cap for the bit or tip.
No. of patents: 3
Last issue date: 04/16/2002

Number	Title	Issue Date
6371127	Cigarette sidestream smoke and free-burn rate control device A device for minimizing cigarette sidestream smoke and reducing the free-burn rate of a burning cigarette, the device comprises: I) a non-combustible tubular element (12) encasing an effective length of a tobacco charge (22) of a cigarette (14) located in...	04/16/2002
5044381	Closed cigarette filter A closed cigarette filter for preventing tobacco from coming into direct contact with the mouth of the user and filtering undesirable products in the smoke, which includes strip of filter material having one edge cut to define multiple, adjacent panels or...	09/03/1991
4190150	Sanitary protective sheath with disposable absorbent liner for tobacco pipe stem A tubular, open ended elongated liquid impervious sheath bears internally, a removable tubular absorbent material liner. A buckled strap borne by the sheath adjacent its mouth permits the sheath to be frictionally clamped to the pipe stem adjacent the bow...	02/26/1980

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