Data processing: generic control systems or specific application – Specific application – apparatus or process – Mechanical control system
Reexamination Certificate
2011-03-29
2011-03-29
Patel, Ramesh B (Department: 2121)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Mechanical control system
C700S265000, C700S282000, C702S045000, C702S046000, C702S047000, C073S001350, C073S061560, C378S047000, C378S080000, C378S083000, C422S105000, C210S198100, C210S198200
Reexamination Certificate
active
07917250
ABSTRACT:
Systems, devices, and methods to mitigate the pressure disturbance associated with the injection of low-pressure analyte samples into a high-pressure HPLC fluid stream to enhance chromatographic performance related to retention time and reproducibility. The injection event is coordinated with active pressure control of a binary solvent delivery system to virtually eliminate the customary pressure drop when the low-pressure loop is brought on line. Consistent timing with the injection event of the mechanical position of the delivery pump pistons, and the start and subsequent gradient delivery generates reproducible results.
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Ciavarini Steven J.
Heden John
Lamoureux John
Pensak, Jr. Stanley P.
Soares Miguel
Chaclas, Esq. George N.
Edwards Angell Palmer & & Dodge LLP
Lauro, Esq. Peter C.
Patel Ramesh B
Waters Technologies Corporation
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