US 11,833,472 B2
Filtration filter and filtration method
Masaru Banju, Nagaokakyo (JP); Shusuke Yokota, Nagaokakyo (JP); and Takashi Kondo, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Jan. 27, 2021, as Appl. No. 17/159,402.
Application 17/159,402 is a continuation of application No. PCT/JP2019/035434, filed on Sep. 10, 2019.
Claims priority of application No. 2018-183725 (JP), filed on Sep. 28, 2018.
Prior Publication US 2021/0146309 A1, May 20, 2021
Int. Cl. B01D 61/18 (2006.01); B01D 63/08 (2006.01)
CPC B01D 61/18 (2013.01) [B01D 63/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A filtration filter comprising:
a filter substrate defining a plurality of through-holes extending from a first principal surface to a second principal surface opposite the first principal surface; and
a plurality of projections that each form a loop that extends along a periphery of a respective through-hole of the plurality of through-holes that is adjoined by the projection, the plurality of projections protruding from the first principal surface so as to define a reservoir part with the first principal surface.