US 11,986,757 B2
Filtration filter
Masaru Banju, Nagaokakyo (JP); Takashi Kondo, Nagaokakyo (JP); and Shusuke Yokota, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on May 18, 2021, as Appl. No. 17/323,125.
Application 17/323,125 is a continuation of application No. PCT/JP2019/050159, filed on Dec. 20, 2019.
Claims priority of application No. 2019-000490 (JP), filed on Jan. 7, 2019.
Prior Publication US 2021/0268417 A1, Sep. 2, 2021
Int. Cl. B01D 39/20 (2006.01); C12M 1/00 (2006.01); C12M 1/26 (2006.01); C23F 1/44 (2006.01); C25D 1/08 (2006.01); C25D 3/56 (2006.01); C25D 5/02 (2006.01); C25D 5/48 (2006.01)
CPC B01D 39/2027 (2013.01) [C12M 29/04 (2013.01); C12M 33/14 (2013.01); C12M 47/02 (2013.01); C12M 47/12 (2013.01); B01D 2239/10 (2013.01); C23F 1/44 (2013.01); C25D 1/08 (2013.01); C25D 3/567 (2013.01); C25D 5/022 (2013.01); C25D 5/48 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A filtration filter comprising:
a surface layer composed mainly of Pd;
a base material composed mainly of a PdNi alloy; and
an intermediate layer between the surface layer and the base material, wherein the intermediate layer is composed mainly of a PdNi alloy in which a Pd:Ni ratio changes from a surface layer side toward a base material side.