US 12,317,920 B2
Smoking article with a mouth end cavity and ventilation
Alen Kadiric, Orpund (CH); and Cecilia Lindholm Delaloye, Preverenges (CH)
Assigned to Philip Morris Products S.A., Neuchatel (CH)
Filed by PHILIP MORRIS PRODUCTS S.A., Neuchatel (CH)
Filed on Oct. 31, 2023, as Appl. No. 18/385,633.
Application 18/385,633 is a continuation of application No. 17/306,468, filed on May 3, 2021, granted, now 11,819,053.
Application 17/306,468 is a continuation of application No. 16/521,966, filed on Jul. 25, 2019, granted, now 11,006,663, issued on May 18, 2021.
Application 16/521,966 is a continuation of application No. 15/552,888, granted, now 10,368,575, issued on Aug. 6, 2019, previously published as PCT/EP2016/056586, filed on Mar. 24, 2016.
Claims priority of application No. 15161533 (EP), filed on Mar. 27, 2015.
Prior Publication US 2024/0130420 A1, Apr. 25, 2024
Int. Cl. A24D 3/04 (2006.01); A24D 3/10 (2006.01); A24D 3/17 (2020.01)
CPC A24D 3/04 (2013.01) [A24D 3/043 (2013.01); A24D 3/10 (2013.01); A24D 3/17 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A smoking article comprising:
a tobacco rod; and
a filter connected to the tobacco rod, the filter comprising:
a hollow mouth end portion formed by a hollow tube segment that is disposed at a mouth end of the filter, wherein the hollow tube segment is formed from an annular shaped segment of filtration material; and
a filtration portion upstream of the hollow mouth end portion, the filtration portion comprising one or more filter segments;
wherein the hollow mouth end portion defines a mouth end cavity at the mouth end of the filter providing an unrestricted flow channel that extends from the downstream end of the filtration portion to the mouth end of the filter,
wherein the smoking article comprises a ventilation zone comprising at least one circumferential row of perforations.