Patents by Inventor Archava Siriraks
Archava Siriraks has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8784655Abstract: A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ion chromatographic system in which the effluent from the detector is recycled to a membrane suppressor and then is mixed with a source of eluent for recycle to the chromatographic column.Type: GrantFiled: September 22, 2011Date of Patent: July 22, 2014Assignee: Dionex CorporationInventors: Yan Liu, Christopher A. Pohl, Nebojsa Avdalovic, John M. Riviello, Archava Siriraks
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Publication number: 20120255910Abstract: A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ion chromatographic system in which the effluent from the detector is recycled to a membrane suppressor and then is mixed with a source of eluent for recycle to the chromatographic column.Type: ApplicationFiled: May 25, 2012Publication date: October 11, 2012Applicant: DIONEX CORPORATIONInventors: Yan Liu, Christopher A. Pohl, Nebojsa Avdalovic, John M. Riviello, Archava Siriraks
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Publication number: 20120024793Abstract: A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ion chromatographic system in which the effluent from the detector is recycled to a membrane suppressor and then is mixed with a source of eluent for recycle to the chromatographic column.Type: ApplicationFiled: September 22, 2011Publication date: February 2, 2012Applicant: Dionex CorporationInventors: Yan Liu, Christopher A. Pohl, Nebojsa Avdalovic, John M. Riviello, Archava Siriraks
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Patent number: 8043507Abstract: A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ion chromatographic system in which the effluent from the detector is recycled to a membrane suppressor and then is mixed with a source of eluent for recycle to the chromatographic column.Type: GrantFiled: December 12, 2007Date of Patent: October 25, 2011Assignee: Dionex CorporationInventors: Yan Liu, Christopher A. Pohl, Nebojsa Avdalovic, John M. Riviello, Archava Siriraks
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Publication number: 20080116139Abstract: A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ion chromatographic system in which the effluent from the detector is recycled to a membrane suppressor and then is mixed with a source of eluent for recycle to the chromatographic column.Type: ApplicationFiled: December 12, 2007Publication date: May 22, 2008Applicant: Dionex CorporationInventors: Yan Liu, Christopher A. Pohl, Nebojsa Avdalovic, John M. Riviello, Archava Siriraks
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Patent number: 7329346Abstract: A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ion chromatographic system in which the effluent from the detector is recycled to a membrane suppressor and then is mixed with a source of eluent for recycle to the chromatographic column.Type: GrantFiled: February 23, 2005Date of Patent: February 12, 2008Assignee: Dionex CorporationInventors: Yan Liu, Christopher A. Pohl, Nebojsa Avdalovic, John M. Riviello, Archava Siriraks
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Publication number: 20060186046Abstract: A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ion chromatographic system in which the effluent from the detector is recycled to a membrane suppressor and then is mixed with a source of eluent for recycle to the chromatographic column.Type: ApplicationFiled: February 23, 2005Publication date: August 24, 2006Inventors: Yan Liu, Christopher Pohl, Nebojsa Avdalovic, John Riviello, Archava Siriraks
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Patent number: 5597481Abstract: A system for pretreating sample streams including a concentrated matrix compound to neutralize the compound. The system includes an electrochemical membrane device in which sample flows through a sample flow channel of the device separated from a matrix ion receiving flow channel by an ion exchange membrane preferentially permeable to ions of the opposite charge to the ions to be analyzed. The ionic species in the thus-pretreated sample are directed to an analytical system such as an ion chromatograph.Type: GrantFiled: June 2, 1995Date of Patent: January 28, 1997Assignee: Dionex CorporationInventors: John R. Stillian, Archava Siriraks
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Patent number: 5571725Abstract: Selected polyvalent anions or cations are removed from a liquid sample stream as a pretreatment for the analysis of the liquid sample stream. A stream containing anions of interest, precipitable anions (e.g. sulfate ions) to be removed and an added displacing salt flow through a first cation exchange resin bed having precipitable exchangeable polyvalent ions (e.g. barium ions). Displacing polyvalent cation (e.g. calcium) displaces the exchangeable polyvalent ion from the cation exchange resin into the liquid sample at sufficient concentration to cause the precipitable anion and exchangeable cation to form a precipitate which remains in the resin bed and is thus is removed from the sample stream. Then the anions of interest in the soluble portion of the liquid sample stream are separated and detected. The invention is also applicable to the removal of precipitable cations (e.g. barium ions) by reversing the roles of the anions and cations.Type: GrantFiled: March 3, 1995Date of Patent: November 5, 1996Assignee: Dionex CorporationInventors: Christopher A. Pohl, Archava Siriraks, Rosanne W. Slingsby, Harpreet S. Dhillon
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Patent number: 5518622Abstract: A system for pretreating sample streams including a concentrated matrix compound to neutralize the compound. The system includes an electrochemical membrane device in which sample flows through a sample flow channel of the device separated from a matrix ion receiving flow channel by an ion exchange membrane preferentially permeable to ions of the opposite charge to the ions to be analyzed. The ionic species in the thus-pretreated sample are directed to an analytical system such as an ion chromatograph.Type: GrantFiled: October 6, 1994Date of Patent: May 21, 1996Assignee: Dionex CorporationInventors: John R. Stillian, Archava Siriraks
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Patent number: 5244634Abstract: A system is provided for the detection of transition elements and/or rare earth elements in an aqueous sample which also contains high concentrations of alkali and alkaline earth metals. The system is effective for determination of transition elements and/or rare earth elements in sea water, industrial waste streams, biological fluids and biological issue samples.Type: GrantFiled: November 29, 1991Date of Patent: September 14, 1993Assignee: The United States of America as represented by the Secretary of CommerceInventors: Howard M. Kingston, Jr., John M. Riviello, Archava Siriraks
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Patent number: 5126272Abstract: A method for the detection of trace transition elements and rare earth elements in a sample also containing alkali metals or alkaline earth elements. The sample is flowed through a chelator column which retains the transition elements and rare earth elements. Then a first eluent (e.g. ammonium acetate) is passed through the column to strip the alkali and alkaline earth metals retained on the column. Then a second eluent (e.g. a strong acid) is passed through the chelator column to remove the transition elements in a chelator effluent which flows through an ion exchange resin concentrator to retain only the transition elements and rare earth elements. Then, a chelator complexing agent (e.g. pyridine-2,6 dicarboxylic acid or an oxalate) flows through the concentrator column to remove the transition elements and rare earth elements.Type: GrantFiled: March 2, 1989Date of Patent: June 30, 1992Assignee: United States of AmericaInventors: Howard M. Kingston, Jr., John M. Riviello, Archava Siriraks