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| Number | Title | Issue Date |
| 7674383 | Method and apparatus for packing chromatography columns A slurry chamber is fastened to and held in coaxial alignment with a chromatography column by a V-band. One end of the column has an end cap and frit. A slurry of fluid and chromatographic media is placed in the column and chamber. A piston is forced through the cha... | 03/09/2010 |
| 7563367 | pH stable chromatographic media using templated multilayer organic/inorganic grafting An advanced silica gel sorbent for use in chromatographic separations that has been chemically modified by surface polycondensation of a trifunctional and/or difunctional organosilane. The chromatographic media exhibits a wider pH range and improved pH stability as ... | 07/21/2009 |
| 7119145 | Surface graft modified resins and formation thereof Pre-formed polymer particles are chemically modified by free radical-initiated surface graft modification. The resulting resin is specifically adapted to provide enhanced chromatographic performance throughout chromatographic separations. ... | 10/10/2006 |
| 6770246 | Sorbent cartridge for solid phase extraction An improved sorbent cartridge for use in preparing fluid samples by solid phase extraction for chemical analysis is provided that uses a pipette having a longitudinal axis and a tip having walls defining a uniformly tapered interior cavity extending along the axis a... | 08/03/2004 |
| 6162362 | Direct screw-on cartridge holder with self-adjustable connection A cartridge holder includes a holder body having a cavity along a longitudinal axis of the holder body. A floating screw has a longitudinal axis and a hole through the length of the floating screw. The floating screw is adapted to engage with the cavity i... | 12/19/2000 |
