Liquid purification or separation – Processes – Separating
Reexamination Certificate
2008-08-25
2011-10-04
Popovics, Robert James (Department: 1778)
Liquid purification or separation
Processes
Separating
C210S778000, C210S290000, C210S193000
Reexamination Certificate
active
08029680
ABSTRACT:
A filtration apparatus and a filtration method are provided. The filtration apparatus includes a filter medium, a first filter layer of a first filter aid disposed on an upstream side of the filter medium, and a second filter layer of a second filter aid disposed on an upstream side of the first filter layer. The first filter aid has a particle size distribution primarily including coarse particles, a representative particle diameter of which is smaller than a representative dimension of openings in the filter medium. The first aid forms bridges over the openings. The second filter aid has a particle size distribution primarily including fine particles, which are smaller than the first filter aid and which themselves cannot form bridges over the openings. The openings of the filter medium and the particles of the second filter layer are adjusted in size by bridging phenomenon of the first filter aid.
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International Search Report (PCT/ISA/210) for PCT/JP2008/002286, dated Sep. 30, 2009, 5 pages.
International Preliminary Examination Report (PCT/ISA/237) for PCT/JP2008/002286, dated Sep. 30, 2009, 6 pages.
Mononobe Sakiyori
Shinoda Takeshi
Kyushu University, National University Corporation
Popovics Robert James
Sughrue & Mion, PLLC
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