Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
2007-07-03
2007-07-03
Le, H. Thi (Department: 1773)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C427S221000, C427S302000, C427S314000
Reexamination Certificate
active
10710937
ABSTRACT:
A porous silica particle suitable can be used in zwitterionic high performance liquid chromatography. The particle comprises covalently bound zwitterionic groups grafted through a polymerization reaction. A hydrophilic column packing material suitable for use as a stationary phase in zwitterionic high performance liquid chromatography may comprise porous silica particles. The particles may comprise covalently bound zwitterionic groups. Methods for manufacturing and applying the silica particles exist.
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Yu et al., “The Synthesis and Characterization of Chemically Bonded Silica-Based Zwitterion-Exchangers for HPLC”, Journal of Chromatographic Science, vol. 24, May 1986, 177-182.
Arasawa et al., “Grafting of zwitterion-type polymers onto silica gel surface and their properties”, Reactive and Functional Polmers 61 (2004) 153-161.
Irgum Knut
Jiang Wen
Le H. Thi
Nixon & Vanderhye P.C.
Sequant AB
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