US 12,449,345 B2
Offline measurement of honeycomb body filtration efficiency
Joseph Henry Citriniti, Corning, NY (US); Curtis Robert Fekety, Corning, NY (US); Christopher Lane Kerr, Tioga, PA (US); Stefan Wolfgang Kramel, Regensburg (DE); Huiqing Wu, Shanghai (CN); and Xinfeng Xing, Shanghai (CN)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 18/008,510
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Jul. 8, 2020, PCT No. PCT/CN2020/100781
§ 371(c)(1), (2) Date Dec. 6, 2022,
PCT Pub. No. WO2022/006767, PCT Pub. Date Jan. 13, 2022.
Prior Publication US 2023/0213433 A1, Jul. 6, 2023
Int. Cl. G01N 15/1434 (2024.01); G01N 15/1404 (2024.01); G01N 15/14 (2006.01)
CPC G01N 15/1434 (2013.01) [G01N 15/1404 (2013.01); G01N 2015/1486 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of determining a filtration efficiency of a filter comprised of a plurality of intersecting porous walls, the filter having a longitudinal axis extending from an inlet end to an outlet end, and an outer peripheral portion extending parallel to the longitudinal axis and surrounding the plurality of intersecting porous walls, the method comprising:
sealing the outer peripheral portion to prevent gas flow across an outermost surface of the outer peripheral portion;
forcing an inlet flow comprised of a gas into the inlet end of the filter at a set flow rate;
introducing particles into the inlet flow; and
optically counting the number of particles entering and exiting the filter during a sampling event.