Patents Assigned to Supelco Incorporated
  • Chiral mobile phase additives for improved liquid-chromatography separations
    Patent number: 5338454
    Abstract: Chromatographic separations and resolutions of racemic mixtures and diastereoisomers are enhanced by simultaneously employing an enantiomeric, chiral stationary phase (CSP) and an enantiomeric, chiral mobile phase additive (CMPA) bearing a stereoisomeric relationship to the CSP but having the opposite chirality are enhanced relative to the use of either a CSP or a CMPA alone. Specific CMPA compositions having the structural formulas ##STR1## are also disclosed.
    Type: Grant
    Filed: August 27, 1992
    Date of Patent: August 16, 1994
    Assignee: Supelco, Incorporated
    Inventor: Keith J. Duff
  • Short-tube heatless concentrator
    Patent number: D312875
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: December 11, 1990
    Assignee: Supelco Incorporated
    Inventor: Paul S. Spock