Liquid purification or separation – With means to add treating material – Chromatography
Reexamination Certificate
2008-07-15
2008-07-15
Therkorn, Ernest G. (Department: 1723)
Liquid purification or separation
With means to add treating material
Chromatography
C210S656000, C096S101000
Reexamination Certificate
active
11072907
ABSTRACT:
Disclosed herein are apparatus and methods for mitigating column bed compression over time. This invention provides for an improved column design and method of controlling bed density in a chromatographic column using a protruding portion of a filter assembly. The invention results in a higher sorbent bed density than can normally be achieved using a fixed length column of conventional design. The invention may be implemented as a unique filter assembly or as a column tailored for the application and a matching filter assembly.
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“Performance of an 18-MM I.D. Column for Analytical and Semi-Pre-Preparative-Scale . . . ”,Journal of Chrom, 122 (1976) 317-329.
Belanger Jonathan
Fisk Raymond P.
Izzo Gary S.
Tuvim Yuri
Ziniti Donald E.
Janiuk Anthony J.
Therkorn Ernest G.
Waters Investments Limited
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