The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1983
Filed:
May. 09, 1980
George H Burnett, Richmond, VA (US);
Warren E Claflin, Bon Air, VA (US);
Harry V Lanzillotti, Midlothian, VA (US);
A Clifton Lilly, Jr, Richmond, VA (US);
John F Nienow, Midlothian, VA (US);
Thomas S Osdene, Richmond, VA (US);
Alline R Wayte, Richmond, VA (US);
Philip Morris, Incorporated, New York, NY (US);
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.