US 12,075,821 B2
Filter segment including a substrate loaded with a smoke-modifying agent
Clement Besso, Neuchatel (CH); and Charles Kuersteiner, Jouxtens-Mezery (CH)
Assigned to Philip Morris USA Inc., Richmond, VA (US)
Filed by Philip Morris USA Inc., Richmond, VA (US)
Filed on Feb. 15, 2021, as Appl. No. 17/175,840.
Application 17/175,840 is a continuation of application No. 16/287,213, filed on Feb. 27, 2019, granted, now 10,918,129.
Application 16/287,213 is a continuation of application No. 12/952,682, filed on Nov. 23, 2010, granted, now 10,244,788, issued on Apr. 2, 2019.
Claims priority of application No. 09252666 (EP), filed on Nov. 23, 2009.
Prior Publication US 2021/0161202 A1, Jun. 3, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A24D 3/04 (2006.01); A24D 3/02 (2006.01); A24D 3/06 (2006.01); A24D 3/14 (2006.01)
CPC A24D 3/048 (2013.01) [A24D 3/0212 (2013.01); A24D 3/061 (2013.01); A24D 3/062 (2013.01); A24D 3/14 (2013.01); Y10T 428/298 (2015.01)] 19 Claims
OG exemplary drawing
 
1. A filter for use in a tobacco article, the filter extending along a longitudinal axis and comprising:
at least one plug of filter material, the filter material including,
cellulose acetate;
at least one filter segment adjacent to the at least one plug of filter material, the filter segment including,
a plurality of granules;
a hollow tube adjacent to one of the at least one plug of filter material and the at least one filter segment; and
a substrate loaded with a menthol solution, the substrate extending through at least a portion of the filter, the substrate being formed of a twisted portion of a filter plug wrap, the twisted portion having a diameter of 1.3 mm.