1
Joseph J Pesek, Sally A Swedberg: Surface-modified chromatographic separation material. Irell and Manella, February 27, 1990: US04904632 (27 worldwide citation)

A method is provided for modifying a porous chromatographic material such as silica, alumina, thoria, titania or magnesia, which involves the steps of halogenating the surface hydroxyl groups of such material, and reacting the halogenated surface with a suitable alkylation reagent. The method gives ...


2
Junior E Sandoval, Joseph J Pesek: Silicon hydride surface intermediates for chemical separations apparatus. Majestic Parsons Siebert & Hsue, May 21, 1991: US05017540 (24 worldwide citation)

The present invention produces very stable, covalently bonded separation substrates for separations application such as liquid and gas chromatography as well as capillary zone electrophoresis. An intermediate substrate is prepared which has hydride species on the substrate surface. These hydrides pr ...


3
Junior E Sandoval, Joseph J Pesek: Stable, covalently-bonded supports for chemical separation apparatus made through a hydride intermediate. Majestic Parsons Siebert & Hsue, July 5, 1994: US05326738 (20 worldwide citation)

The present invention produces very stable, covalently bonded separation substrates for separations application such as liquid and gas chromatography as well as capillary zone electrophoresis. An intermediate substrate is prepared which has hydride species on the substrate surface. These hydrides pr ...