Liquid purification or separation – With means to add treating material – Chromatography
Reexamination Certificate
2005-11-08
2005-11-08
Therkorn, Ernest G. (Department: 1723)
Liquid purification or separation
With means to add treating material
Chromatography
C210S656000, C210S101000, C210S143000
Reexamination Certificate
active
06962658
ABSTRACT:
A variable flow rate injector provides accurate, precise, and reproducible injection volumes that have low dispersion. The invention is particularly well-suited for HPLC injection volumes <500 nL but can be used to inject larger volumes and in different applications as well. Injections are performed at a first flow rate and separations are performed at a second flow rate. For improved HPLC system performance, the first flow rate is less than the second flow rate. The injector uses a variable flow rate fluid supply that allows rapid switching between flow rates desired for injection and flow rates desired for separations.
REFERENCES:
patent: 5236847 (1993-08-01), Satake et al.
patent: 5789258 (1998-08-01), Drinkwine et al.
patent: 5827426 (1998-10-01), Fujii et al.
patent: 5942093 (1999-08-01), Rakestraw et al.
patent: 6290909 (2001-09-01), Paul et al.
patent: 6492184 (2002-12-01), Petro et al.
patent: 6833068 (2004-12-01), Paul et al.
patent: 2002/0146840 (2002-10-01), Hage et al.
patent: 2003/0064008 (2003-04-01), Hage et al.
Foster, Marc D., Performance of Experimental Sample Injectors for High-Performance Liquid Chromatography Microcolumns, Journal of Chromatography (2000), p. 231-241.
Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority (PCT-US04/15838).
Neyer David W.
Rakestraw David J.
Rehm Jason E.
Eksigent Technologies LLC
Sheldon Jeffrey G.
Sheldon & Mak
Therkorn Ernest G.
LandOfFree
Variable flow rate injector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable flow rate injector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable flow rate injector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3515034