Patents by Inventor John M. Riviello
John M. Riviello 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: 8308952Abstract: 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: May 25, 2012Date of Patent: November 13, 2012Assignee: Dionex CorporationInventors: Yan Liu, Christopher A. Pohl, Nebojsa Avdalovic, John M. Riviello, Arachava 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: 20120241378Abstract: An electrolytic CO2-removal device for anion analysis of a liquid sample. The device includes a basic chamber and CO2-permeable tubing in the basic chamber. Anion exchange membranes are disposed on opposite sides of the basic chamber, and electrodes are disposed outside the membranes. The device can be integral with a suppressor in an ion chromatography system and/or an aqueous stream purifier. Also, methods performed by the device.Type: ApplicationFiled: March 22, 2011Publication date: September 27, 2012Applicant: Dionex CorporationInventor: John M. Riviello
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Patent number: 8129194Abstract: The present invention pertains to a method of ion chromatography wherein a specialized electrodeionization (EDI) apparatus is used for simultaneous ion suppression of cations from a flowing base containing an anion sample of interest and ion suppression of anions from a flowing acid containing a cation sample of interest. The methods described herein allow for the ion suppression of samples containing chloride, nitrate, and other electrochemically active anions, as well as sodium, potassium, and other electrochemically active cations, without causing damage to the suppressor.Type: GrantFiled: January 14, 2011Date of Patent: March 6, 2012Assignee: Trovion Singapore Pte. Ltd., Co.Inventor: John M. Riviello
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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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Patent number: 8021555Abstract: A suppressed ion chromatographic apparatus using a regenerant recycle loop, comprising (a) an ion separation device, (b) a membrane suppressor, (c) a detector, (d) a container for regenerant solution, (e) a first conduit between the ion separation device and the suppressor, (f) a second conduit between the regenerant solution container and the suppressor, (g) a third conduit between the suppressor and the regenerant solution container, and (h) a regenerant solution recycle loop out of fluid communication with the detector outlet.Type: GrantFiled: December 17, 2008Date of Patent: September 20, 2011Assignee: Dionex CorporationInventors: Yan Liu, Victor Manuel Berber Barreto, Christopher A. Pohl, John M. Riviello
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Publication number: 20110114489Abstract: The present invention pertains to a method of ion chromatography wherein a specialized electrodeionization (EDI) apparatus is used for simultaneous ion suppression of cations from a flowing base containing an anion sample of interest and ion suppression of anions from a flowing acid containing a cation sample of interest. The methods described herein allow for the ion suppression of samples containing chloride, nitrate, and other electrochemically active anions, as well as sodium, potassium, and other electrochemically active cations, without causing damage to the suppressor.Type: ApplicationFiled: January 14, 2011Publication date: May 19, 2011Inventor: John M. Riviello
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Patent number: 7892848Abstract: The present invention pertains to a method of ion chromatography wherein a specialized electrodeionization (EDI) apparatus is used for (1) the preparation of a pure acid or pure base for use as an eluent in a chromatographic separation column and/or (2) for ion suppression (or neutralization) of the acid or base after it has been used to elute ions from a chromatographic separation column. Methods for trace ion removal, acid and base neutralization, and ion suppression using a specialized EDI apparatus are also described. The methods described herein allow for the ion suppression of samples containing chloride, nitrate, and other electrochemically active anions, without causing damage to the suppressor.Type: GrantFiled: April 12, 2006Date of Patent: February 22, 2011Assignee: Trovion Singapore Pte. Ltd., Co.Inventor: John M. Riviello
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Publication number: 20100126867Abstract: The present invention relates generally to the deionization of liquids through the use of electrodeionization methods and apparatuses. The apparatuses may be configured to minimize the fouling of the electrode chambers and to provide continuous regeneration of the ion exchange materials. The apparatuses may be configured according to the desired levels of deionization for anions, cations, or both. Finally, methods are presented for various uses of the apparatuses.Type: ApplicationFiled: April 17, 2008Publication date: May 27, 2010Applicant: Trovion Ple LTD.Inventor: John M. Riviello
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Publication number: 20100108521Abstract: The present invention relates generally to the deionization of liquids through the use of electrodeionization methods and apparatuses. The apparatuses may be configured to minimize the fouling of the electrode chambers and to provide continuous regeneration of the ion exchange materials. The apparatuses may be configured according to the desired levels of deionization for anions, cations, or both. Finally, methods are presented for various uses of the apparatuses.Type: ApplicationFiled: April 17, 2008Publication date: May 6, 2010Applicant: Trovion Pte. LTD.Inventor: John M. Riviello
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Publication number: 20090188798Abstract: Electrolytic eluent recycle systems for ion chromatography using a multi-channel electrolytic ion exchange device which integrates suppression, eluent generation, and eluent recycle. The systems recycle the eluent into the analytical system without passing the eluent through the electrode chambers. Also, such systems with a channel for electrolytic removal of ions from the suppression effluent before recycle.Type: ApplicationFiled: January 27, 2009Publication date: July 30, 2009Inventor: John M. Riviello
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Publication number: 20090101582Abstract: A suppressed ion chromatographic apparatus using a regenerant recycle loop, comprising (a) an ion separation device, (b) a membrane suppressor, (c) a detector, (d) a container for regenerant solution, (e) a first conduit between the ion separation device and the suppressor, (f) a second conduit between the regenerant solution container and the suppressor, (g) a third conduit between the suppressor and the regenerant solution container, and (h) a regenerant solution recycle loop out of fluid communication with the detector outlet.Type: ApplicationFiled: December 17, 2008Publication date: April 23, 2009Applicant: Dionex CorporationInventors: Yan Liu, Victor Manuel Berber Barreto, Christopher A. Pohl, John M. Riviello
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Patent number: 7473354Abstract: A suppressed ion chromatographic apparatus using a regenerant recycle loop, comprising (a) an ion separation device, (b) a membrane suppressor, (c) a detector, (d) a container for regenerant solution, (e) a first conduit between the ion separation device and the suppressor, (f) a second conduit between the regenerant solution container and the suppressor, (g) a third conduit between the suppressor and the regenerant solution container, and (h) a regenerant solution recycle loop out of fluid communication with the detector outlet.Type: GrantFiled: September 16, 2005Date of Patent: January 6, 2009Assignee: Dionex CorporationInventors: Yan Liu, Victor Manuel Berber Barreto, Christopher A. Pohl, John M. Riviello
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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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Patent number: 6610546Abstract: An electrolytic suppressor including (a) packing (a suppressor bed of ion exchange resin or a flow-through monolith), (b) an electrode chamber adjacent the suppressor, (c) a first electrode in the electrode chamber, (d) a barrier separating the packing from the first electrode chamber preventing significant liquid flow but permitting transport of ions only of the same charge as the packing, (e) a second electrode in electrical communication with the resin bed, and (f) a recycle conduit between the suppressor outlet port and said electrode chamber. Charged transverse partitions with openings may be included to create a serpentine liquid path.Type: GrantFiled: August 25, 2000Date of Patent: August 26, 2003Assignee: Dionex CorporationInventors: Yan Liu, Kannan Srinivasan, Nebojsa Avdalovic, Hamish Small, John M. Riviello
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Patent number: 6508985Abstract: An electrolyitic suppressor including (a) a suppressor bed of ion exchange resin, (b) an electrode chamber adjacent the suppressor, (c) a first electrode in the electrode chamber, (d) a barrier separating the suppressor bed from the first electrode chamber preventing significant liquid flow but permitting transport of ions only of the same charge as the suppressor bed resin, (e) a second electrode in electrical communication with the resin bed, and (f) a recycle conduit between the suppressor outlet port and said electrode chamber. The second electrode may be in contact with the ion exchange resin in the suppressor or located in second electrode chamber.Type: GrantFiled: June 8, 2001Date of Patent: January 21, 2003Assignee: Dionex CorporationInventors: Hamish Small, Yan Liu, John M. Riviello, Nebojsa Avdalovic, Kannan Srinivasan
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Patent number: 6495371Abstract: For anion analysis, the method includes: (a) flowing an aqueous liquid sample stream containing anions to be detected and cation hydroxide through a separator bed, (b) flowing the aqueous effluent from the separator bed through a flow-through suppressor, (c) flowing the effluent liquid from the suppressor past a detector, (d) recycling said liquid effluent from the detector through a cathode chamber proximate to the suppressor bed and separated by a first barrier, and (e) applying an electrical potential between the cathode and the anode. Water is electrolyzed at the anode to cause cations on the cation exchange resin to electromigrate toward the barrier and to be transported across the barrier toward the cathode while water in the cathode chamber is electrolyzed to generate hydroxide ions which combine with the transported cations to form cation hydroxide in the cathode chamber.Type: GrantFiled: June 8, 2001Date of Patent: December 17, 2002Assignee: Dionex CorporationInventors: Hamish Small, Yan Liu, John M. Riviello, Nebojsa Avdalovic, Kannan Srinivasan
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Patent number: 6325976Abstract: An electrolyitic suppressor including (a) a suppressor bed of ion exchange resin, (b) an electrode chamber adjacent the suppressor, (c) a first electrode in the electrode chamber, (d) a barrier separating the suppressor bed from the first electrode chamber preventing significant liquid flow but permitting transport of ions only of the same charge as the suppressor bed resin, (e) a second electrode in electrical communication with the resin bed, and (f) a recycle conduit between the suppressor outlet port and said electrode chamber. The second electrode may be in contact with the ion exchange resin in the suppressor or located in second electrode chamber.Type: GrantFiled: February 26, 1998Date of Patent: December 4, 2001Assignee: Dionex CorporationInventors: Hamish Small, Yan Liu, John M. Riviello, Nebojsa Avdalovic, Kannan Srinivasan