Patents Assigned to Lee Scientific, Inc.
  • Chromatography columns with cast porous plugs and methods of fabricating same
    Patent number: 4793920
    Abstract: Porous ceramic plugs are cast in place in chromatographic columns in order to provide supports for chromatographic beds in liquid chromatography devices and restrictors in supercritical fluid chromatographic devices. The supports are cast in place by fusing a silicate containing solution, such as one containing potassium silicate, which has been drawn into the outlet end of the column.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: December 27, 1988
    Assignee: Lee Scientific, Inc.
    Inventors: Hernan Cortes, Curtis D. Pfeiffer, Bruce E. Richter, Timothy S. Stevens