US 12,484,611 B2
Firm filter for aerosol-generating article
Alberto Bonici, Neuchâtel (CH); Edoardo Montanari, Bologna (IT); and Emeric Grandjean, Neuchâtel (CH)
Assigned to Philip Morris Products S.A., Neuchâtel (CH)
Appl. No. 16/957,661
Filed by PHILIP MORRIS PRODUCTS S.A., Neuchâtel (CH)
PCT Filed Dec. 17, 2018, PCT No. PCT/IB2018/060186
§ 371(c)(1), (2) Date Jun. 24, 2020,
PCT Pub. No. WO2019/130153, PCT Pub. Date Jul. 4, 2019.
Claims priority of application No. 17210873 (EP), filed on Dec. 28, 2017.
Prior Publication US 2020/0329759 A1, Oct. 22, 2020
Int. Cl. A24D 3/04 (2006.01); A24D 3/06 (2006.01); A24D 3/14 (2006.01); A24D 3/17 (2020.01)
CPC A24D 3/04 (2013.01) [A24D 3/062 (2013.01); A24D 3/14 (2013.01); A24D 3/17 (2020.01)] 19 Claims
OG exemplary drawing
 
1. An aerosol-generating article comprising:
an aerosol forming substrate; and
a filter downstream of the aerosol-generating substrate,
wherein the filter comprises filter material and has a resistance to draw (RTD) of 3.3 mmWG or less per mm of filter length, and
wherein the aerosol-generating article has an average radial hardness of 96% or greater when measured around the filter, wherein the average radial hardness is measured by applying a load of 2 kg for 20 seconds around the filter of the aerosol-generating article and comparing the ratio of the original, uncompressed diameter to the diameter after the load is applied.