Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Reexamination Certificate
2005-04-19
2005-04-19
Teskin, Fred (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
C521S025000, C521S029000, C521S053000, C525S060000, C525S113000, C525S375000, C525S379000, C525S380000, C210S656000, C210S660000, C210S661000, C210S683000, C428S402000
Reexamination Certificate
active
06881761
ABSTRACT:
Disclosed are (1) a porous polymer particle comprising a polymer substrate having ester bonds connected to a group containing a quaternary ammonium structure through a spacer molecule, (2) an alkali-resistant, high-strength porous polymer particle having ester bonds connected to a group containing a quaternary ammonium structure through a spacer molecule, a part of the ester bonds being saponified and converted to a hydroxyl group(s), (3) a porous polymer particle comprising a polymer substrate having ester bonds connected to a group containing a quaternary ammonium structure through a spacer molecule, the porous polymer particles being treated with an alkaline solution to generate a hydroxyl and/or a carboxyl group on a surface of the substrate, (4) an anion exchanger comprising any one of the particles (1) to (3) above, (5) a packing material for anion chromatography comprising the anion exchanger (4) above, (6) a column for anion chromatography using the anion exchanger (4) above, and (7) a method for measuring anions using the anion exchanger (4) above.
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English Language Translation of JP 52-35779 to Fujiwara et al, published 19770318.*
Chemical Abstracts, JP 77 035779, date Jul. 25, 1977.
Derwent Abstract, JP 09-077790, date Mar. 25, 1997.
Derwent Abstract, JP 2001-040032, date Feb. 13, 2001.
Kotsuka Takashi
Sakuma Hisako
Shimbo Kuniaki
Suzuki Hiroshi
Tokuda Toshio
Showa Denko K.K.
Teskin Fred
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