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:
Mar. 20, 2018
Filed:
Dec. 20, 2013
Philip Morris Products S.a., Neuchatel, CH;
Oleg Mironov, Neuchatel, CH;
Daniele Sanna, Castel Maggiore, IT;
Frederic Lavanchy, Grandson, CH;
Stephane Roudier, Colombier, CH;
PHILIP MORRIS PRODUCTS S.A., Neuchatel, CH;
Abstract
A smoking article is provided, having a mouth end and a distal end, including a heat source; an aerosol-forming substrate; an airflow directing element including an air-permeable segment downstream of the substrate and defining an airflow pathway; and at least one air inlet for drawing air into the segment, wherein the pathway includes a first portion extending from the inlet towards the substrate and a second portion extending from the substrate towards the mouth end, wherein the first portion is defined by a low resistance-to-draw portion of the segment that extends from proximate to the inlet to an upstream end of the segment, and the segment further includes a high resistance-to-draw portion that extends from proximate to the inlet to a downstream end of the segment, and the ratio of the resistance-to-draw of the high portion to the low portion is higher than 1:1 and lower than 50:1.