U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Smoking article

Patent 4391285 Issued on July 5, 1983. Estimated Expiration Date: Icon_subject July 5, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

235885

235886

346025

1437956

1559322

1778482

2349551

2485670

2598680

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Inventors

Assignee

Application

No. 06/148124 filed on 05/09/1980

US Classes:

131/364, Blank or filler131/360, Cigar or cigarette131/366, Plug tobacco131/367, Having specific shape131/368, With indentification, marking, label, or tag131/370, METHOD OR APPARATUS FOR MAKING RECONSTITUTED TOBACCO131/372, Slurry131/375, Extrusion131/77, Molding or forming131/78, Combined131/79, With tobacco treatment131/85Molds

Examiners

Primary: Millin, V.

International Classes

A24C 5/00 (20060101)
A24D 1/14 (20060101)
A24D 1/00 (20060101)

Abstract

Smoking articles comprising a high density, relatively low porosity coherent mass of combustible tobacco-containing material having at least one passage extending therethrough are disclosed. In a preferred embodiment the smoking article is a cylinder having at least one passage axially therethrough. The smoking article may further comprise a plug of ignitable material in passage blocking position at one end of the passage, said plug being such as to permit puff induced air flow therethrough. At least one additional plug may be similarly disposed at the opposite end of the passage or at an intermediate point in the passage. By adjusting the density, the surface area and/or the porosity of the mass available for combustion, the per puff delivery of tar by the smoking article upon combustion may be controlled.

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