US 12,233,290 B2
Multi-layer face mask
Donato Polignone, Emeryville, CA (US)
Assigned to NuGeneration Technologies, LLC, Emeryville, CA (US)
Filed by NuGeneration Technologies, LLC, Emeryville, CA (US)
Filed on Apr. 1, 2021, as Appl. No. 17/220,772.
Claims priority of provisional application 63/006,035, filed on Apr. 6, 2020.
Prior Publication US 2021/0308497 A1, Oct. 7, 2021
Int. Cl. A62B 18/02 (2006.01); A41D 13/11 (2006.01); A62B 27/00 (2006.01); B01D 39/08 (2006.01)
CPC A62B 18/025 (2013.01) [A41D 13/11 (2013.01); B01D 39/08 (2013.01); A62B 27/00 (2013.01); B01D 2239/065 (2013.01); Y10T 442/3472 (2015.04)] 20 Claims
OG exemplary drawing
 
1. A face mask, comprising:
a first filter layer comprising a first yarn; and
a second filter layer comprising a second yarn, wherein the second yarn is disposed at a non-right and non-parallel angle relative to the first yarn.