Liquid purification or separation – With means to add treating material – Chromatography
Reexamination Certificate
2007-03-06
2007-03-06
Therkorn, Ernest G. (Department: 1723)
Liquid purification or separation
With means to add treating material
Chromatography
C210S101000, C210S659000, C422S070000
Reexamination Certificate
active
10851497
ABSTRACT:
A method and apparatus for monitoring and controlling the nano-scale flow rate of fluid in the operating flow path of a HPLC system. A first flow sensor is disposed in a first flow path between a first flow-divider and a fluidic tee. A second flow sensor is disposed in a second flow path between a second flow-divider and the fluidic tee. A first recycle flow restrictor is disposed in the first recycle flow path in fluid communication with the first flow-divider. A second recycle flow restrictor is disposed in the second The permeability of each recycle flow restrictor can be selected to produce a desired flow rate with each respective flow path. The output signals of the first and second flow sensors to control output of a pump within each flow path.
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Gerhardt Geoff C.
Luongo Joseph A.
Janiuk Anthony J.
Michaelis Brian
Therkorn Ernest G.
Waters Investments Limited
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