Pumps – Electrical or getter type
Reexamination Certificate
2006-06-29
2011-11-15
Roy, Sikha (Department: 2879)
Pumps
Electrical or getter type
C417S050000, C204S450000, C204S451000, C204S454000, C204S601000
Reexamination Certificate
active
08057191
ABSTRACT:
The invention is directed to the elimination of changes of the chemical composition of a pumped liquid caused by introduction of strange components or by modification of original components. Another object of the invention is to provide the possibility of use of electrodes of the first order in order to increase productivity and decrease size and cost of the micropump.For this purpose, the electrokinetic micropump comprises a multichannel structure810made of non-conducting material, for example, a piece of a polycapillary column. The inlet and outlet end of this structure are adjacent to electrode sections803, 804having openings821, 822for inlet and outlet of the pumped liquid. These sections are divided by ion-exchange membranes811, 812into chambers813, 814for flow of the pumped liquid, communicating with the ends841, 842of the multichannel structure, and chambers815, 816filled with an auxiliary medium for transfer of electric charges. In the latter electrodes817, 818are located. One of the membranes, namely, membrane811, is monopolar, and its type corresponds to the polarity of the adjacent electrode817. The other membrane, namely, membrane812, is bipolar and faces the adjacent electrode818with its side that corresponds to the polarity of said electrode. On one or both sides of each ion-exchange membrane may be installed baromembranes829, 830for nanofiltration or reverse osmosis. As auxiliary medium may be used, in particular, the pumped liquid itself or a granulated ion-exchange material.
REFERENCES:
patent: 5279608 (1994-01-01), Cherif Cheikh
patent: 5788826 (1998-08-01), Nyberg
patent: 5891097 (1999-04-01), Saito et al.
patent: 7118671 (2006-10-01), Kumakhov et al.
patent: 7316543 (2008-01-01), Goodson et al.
patent: 7896867 (2011-03-01), Gordon et al.
patent: 31859 (2003-08-01), None
Manz, A., et al., “Electroosmotic pumping and electrophoretic separations for miniaturized chemical analysis systems,” J. Micromech. Microeng., 1994, p. 257-265, vol. 4, IOP Publishing Ltd.
Chen, C.-H., et al., “A Planar Electroosmotic Micropump,” Journal of Microelectromechanical Systems, Dec. 2002, p. 672-683, vol. 11, No. 6, IEEE.
Geschke, O., et al., “Microsystem Engineering of Lab-on-a-chip Devices,” 2004, p. 46-50, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Moini, M., et al., “Hydroquinone as a Buffer Additive for Suppression of Bubbles Formed by Electrochemical Oxidation of the CE Buffer at the Outlet Electrode in Capillary Electrophoresis/Electrospray Ionization-Mass Spectrometry,” Analytical Chemistry, Apr. 15, 1999, p. 1658-1661, vol. 71, No. 8, American Chemical Society.
Takamura, Y., et al., “Low-voltage electroosmosis pump for stand-alone microfluidics devices,” Electrophersis, 2003, p. 185-192, vol. 24, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Bastrykina Natalia Sergeevna
Khamizov Ruslan Khazhsetovich
Khamizov, legal representative Ruslan Khazhsetovich
Kumakhov Muradin Abubekirovich
Nikitina Svetlana Vassilievna
McDermott Will & Emery LLP
Obshschestvo S Orgranichennoj Otvetstvennostyu “Institu R
Roy Sikha
LandOfFree
Electrokinetic micropump having ion-exchange membranes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrokinetic micropump having ion-exchange membranes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrokinetic micropump having ion-exchange membranes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4302514