Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Reexamination Certificate
2007-04-11
2009-08-18
Fitzgerald, John (Department: 2856)
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
C137S625460
Reexamination Certificate
active
07574901
ABSTRACT:
A flow path switching valve is provided, in which an impact due to the pressure change when a flow path is switched is prevented from being generated. (A) A rotor slot1callows an analysis infusion pump11to be connected to an analytical column13, so as to form a flow path (condensing procedure). (B) The rotor of the flow path switching valve1is rotated clockwise for 30 degrees, the rotor slot1callows the analysis infusion pump11, the analytical column13, and a trap column5be connected. After the pressure in the trap column5is raised to the same pressure level as that of the analytical column13, the pressure is stabilized, and the pressure difference between the two columns5and13is counteracted (high-pressure procedure). (C) After the pressure between the two columns5and13has been stabilized sufficiently, the rotor is further rotated for 30 degrees, and the trap column5and the analytical column13are connected in series, so the sample analysis can be performed (dissolution procedure and detection procedure).
REFERENCES:
patent: 3477207 (1969-11-01), Auger
patent: 3748833 (1973-07-01), Karas et al.
patent: 3796232 (1974-03-01), Dalton
patent: 3868970 (1975-03-01), Ayers et al.
patent: 4614204 (1986-09-01), Dolejs
patent: 4625569 (1986-12-01), Toei et al.
patent: 4632149 (1986-12-01), Oroskar et al.
patent: 4633904 (1987-01-01), Schumann et al.
patent: 5010921 (1991-04-01), Nohl
patent: 5105851 (1992-04-01), Fogelman
patent: 6012487 (2000-01-01), Hauck
patent: 6161583 (2000-12-01), Morris
patent: 6672336 (2004-01-01), Nichols
patent: 6789573 (2004-09-01), Knapp
patent: 6874354 (2005-04-01), Cueni et al.
patent: 6997213 (2006-02-01), Towler et al.
patent: 7213615 (2007-05-01), Cueni et al.
patent: 1327157 (2001-12-01), None
patent: 62056858 (1987-03-01), None
patent: WO 2004088303 (2004-10-01), None
Fitzgerald John
J.C. Patents
Shimadzu Corporation
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