Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Reexamination Certificate
2008-09-16
2008-09-16
Pezzuto, Helen L. (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
C521S061000, C521S142000, C521S146000, C521S149000, C523S218000
Reexamination Certificate
active
11301122
ABSTRACT:
A porous ion exchanger includes an open cell structure including interconnected macropores and mesopores whose average diameter is in a range of 1 to 1000 μm existing on walls of the macropores. Moreover, a total pore volume is in a range of 1 to 50 ml/g, ion exchange groups are uniformly distributed, and an ion exchange capacity is not less than 0.5 mg equivalent/g of dry porous ion exchanger. The porous ion exchanger can be used as an ion exchanger filled into a deionization module of an electrodeionization water purification device, solid acid catalyst, adsorbent, and filler for chromatography.
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Inoue Hiroshi
Nakamura Hideo
Tamura Makio
Yamanaka Koji
Yoshida Shusaku
Organo Corporation
Osha & Liang LLP
Pezzuto Helen L.
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