Patents by Inventor Thomas H. Walters
Thomas H. Walters 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: 11874256Abstract: The present disclosure is directed to methods for evaluating system inertness, such as the inertness of a LC or other fluidic system. Some methods are directed to tests wherein the column has been removed prior to injecting a sample including a positive (e.g., metal reacting moiety) control into the system. Some methods can include: (1) repeatedly injecting the sample into a system, the system comprising: fluidic paths wherein interior surfaces of the fluidic paths define wetted surfaces, and wherein at least a portion of the wetted surfaces of the fluidic flow path are coated with an inert coating, wherein the inert coating is inert to at least one analyte in the sample; (2) detecting a value associated with the positive control; and (3) analyzing values associated with the detected positive control to determine system inertness.Type: GrantFiled: September 10, 2021Date of Patent: January 16, 2024Assignee: Waters Technologies CorporationInventors: Amit Patel, Moon Chul Jung, Thomas H. Walter, Matthew A. Lauber, Kevin Wyndham, Mathew DeLano, Jennifer Simeone
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Publication number: 20230204478Abstract: In various aspects, the present disclosure pertains to methods of performing a sample enrichment procedure, which comprise: adding a sample fluid that comprises at least one phospholipid and at least one target analyte to a sorbent that comprises a hydrophobic component and a cation exchange component, thereby resulting in sorbent with bound phospholipid and bound target analyte; adding an aqueous solution comprising an acidic compound and a salt; adding an organic solution to the sorbent thereby desorbing at least a portion of the bound phospholipid from the sorbent; and adding an elution solution to the sorbent, thereby desorbing at least a portion of the bound target analyte from the sorbent and forming a solution of the target analyte in the elution solution. In other aspects, the present disclosure pertains to kits, which may be used in conjunction with such methods.Type: ApplicationFiled: February 9, 2023Publication date: June 29, 2023Applicant: Waters Technologies CorporationInventors: Bonnie A. Alden, Kenneth Berthelette, Jon Finch, Donna Osterman, Thomas Swann, Thomas H. Walter
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Patent number: 11604123Abstract: In various aspects, the present disclosure pertains to methods of performing a sample enrichment procedure, which comprise: adding a sample fluid that comprises at least one phospholipid and at least one target analyte to a sorbent that comprises a hydrophobic component and a cation exchange component, thereby resulting in sorbent with bound phospholipid and bound target analyte; adding an aqueous solution comprising an acidic compound and a salt; adding an organic solution to the sorbent thereby desorbing at least a portion of the bound phospholipid from the sorbent; and adding an elution solution to the sorbent, thereby desorbing at least a portion of the bound target analyte from the sorbent and forming a solution of the target analyte in the elution solution. In other aspects, the present disclosure pertains to kits, which may be used in conjunction with such methods.Type: GrantFiled: December 21, 2018Date of Patent: March 14, 2023Assignee: Waters Technologies CorporationInventors: Bonnie A. Alden, Kenneth Berthelette, Jon Finch, Donna Osterman, Thomas Swann, Thomas H. Walter
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Publication number: 20220091079Abstract: The present disclosure is directed to a kit for evaluating system inertness. The kit includes a positive control comprising a metal interacting moiety, and a negative control that does not contain a metal interacting moiety. In some embodiments the kit also includes a container to hold a system suitability solution (e.g., an equimolar mixture of the positive control and the negative control).Type: ApplicationFiled: September 10, 2021Publication date: March 24, 2022Applicant: Waters Technologies CorporationInventors: Amit Patel, Moon Chul Jung, Susan Rzewuski, Matthew A. Lauber, Thomas H. Walter, Kevin Wyndham, Mathew DeLano, Jennifer Simeone
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Publication number: 20220082532Abstract: The present disclosure is directed to methods for evaluating system inertness, such as the inertness of a LC or other fluidic system. Some methods are directed to tests wherein the column has been removed prior to injecting a sample including a positive (e.g., metal reacting moiety) control into the system. Some methods can include: (1) repeatedly injecting the sample into a system, the system comprising: fluidic paths wherein interior surfaces of the fluidic paths define wetted surfaces, and wherein at least a portion of the wetted surfaces of the fluidic flow path are coated with an inert coating, wherein the inert coating is inert to at least one analyte in the sample; (2) detecting a value associated with the positive control; and (3) analyzing values associated with the detected positive control to determine system inertness.Type: ApplicationFiled: September 10, 2021Publication date: March 17, 2022Applicant: Waters Technologies CorporationInventors: Amit Patel, Moon Chul Jung, Susan Rzewuski, Thomas H. Walter, Matthew A. Lauber, Kevin Wyndham, Mathew DeLano, Jennifer Simeone
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Publication number: 20220082531Abstract: The present disclosure is directed to methods of characterizing a system containing a chromatographic column. The methods can include introducing a sample comprising a positive control and a negative control to the system containing a chromatographic column, wherein the positive control is a sensitive probe that interacts with the system and the negative control is substantially non-interacting with the system; after passing the sample through the chromatographic column, detecting the positive control and the negative control; and determining system suitability by comparing the amount of detected positive control to negative control. In some embodiments, determining system suitability (e.g., inertness of sample to the system) is accomplished by determining a ratio of detected positive control to negative control.Type: ApplicationFiled: September 10, 2021Publication date: March 17, 2022Applicant: Waters Technologies CorporationInventors: Amit Patel, Moon Chul Jung, Susan Rzewuski, Thomas H. Walter, Matthew A. Lauber, Kevin Wyndham, Mathew DeLano, Jennifer Simeone
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Publication number: 20210239655Abstract: The present invention is directed to a device and a method for performing size exclusion chromatography. Embodiments of the present invention feature devices and methods for size exclusion chromatography at normal high performance liquid chromatography or ultra performance liquid chromatography pressures and above using small particles.Type: ApplicationFiled: February 11, 2021Publication date: August 5, 2021Applicant: Waters Technologies CorporationInventors: Edouard S. P. Bouvier, Kevin D. Wyndham, Thomas H. Walter, Uwe D. Neue
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Publication number: 20210220753Abstract: The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a hydrophobic surface group and one or more ionizable modifier.Type: ApplicationFiled: March 12, 2021Publication date: July 22, 2021Applicant: Waters Technologies CorporationInventors: Kevin D. Wyndham, Pamela C. Iraneta, Thomas H. Walter
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Patent number: 10974167Abstract: The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a hydrophobic surface group and one or more ionizable modifier.Type: GrantFiled: November 28, 2018Date of Patent: April 13, 2021Assignee: Waters Technologies CorporationInventors: Kevin D. Wyndham, Pamela C. Iraneta, Thomas H. Walter
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Patent number: 10800799Abstract: Methods, kits and devices for separating phospholipids and proteins from small molecules in biochemical samples can feature an apparatus having a wetting barrier, at least one frit and a separation media. For example, an apparatus can include at least one wall defining a chamber having an exit and an entrance; a wetting barrier disposed between the exit and entrance, so as to define a separation media space located between the wetting barrier and the exit and a sample receiving area located between the wetting barrier and the entrance; and a separation media disposed adjacent to the wetting barrier and having a specific affinity for phospholipids.Type: GrantFiled: March 30, 2018Date of Patent: October 13, 2020Assignee: Waters Technologies CorporationInventors: Pamela C. Iraneta, Thomas H. Walter, Xin Zhang, Daniel P. Walsh, Kevin D. Wyndham, Raymond P. Fisk
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Publication number: 20190195758Abstract: In various aspects, the present disclosure pertains to methods of performing a sample enrichment procedure, which comprise: adding a sample fluid that comprises at least one phospholipid and at least one target analyte to a sorbent that comprises a hydrophobic component and a cation exchange component, thereby resulting in sorbent with bound phospholipid and bound target analyte; adding an aqueous solution comprising an acidic compound and a salt; adding an organic solution to the sorbent thereby desorbing at least a portion of the bound phospholipid from the sorbent; and adding an elution solution to the sorbent, thereby desorbing at least a portion of the bound target analyte from the sorbent and forming a solution of the target analyte in the elution solution. In other aspects, the present disclosure pertains to kits, which may be used in conjunction with such methods.Type: ApplicationFiled: December 21, 2018Publication date: June 27, 2019Inventors: Bonnie A. Alden, Kenneth Berthelette, Jon Finch, Donna Osterman, Thomas Swann, Thomas H. Walter
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Publication number: 20190091606Abstract: The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a hydrophobic surface group and one or more ionizable modifier.Type: ApplicationFiled: November 28, 2018Publication date: March 28, 2019Applicant: Waters Technologies CorporationInventors: Kevin D. Wyndham, Pamela C. Iraneta, Thomas H. Walter
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Patent number: 10159911Abstract: The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a hydrophobic surface group and one or more ionizable modifier.Type: GrantFiled: January 25, 2013Date of Patent: December 25, 2018Assignee: Waters Technologies CorporationInventors: Kevin Daniel Wyndham, Pamela C. Iraneta, Thomas H. Walter
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Patent number: 10150098Abstract: The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof.Type: GrantFiled: August 4, 2010Date of Patent: December 11, 2018Assignee: WATERS TECHNOLOGIES CORPORATIONInventors: Kevin D. Wyndham, Pamela C. Iraneta, Thomas H. Walter
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Publication number: 20180291044Abstract: Methods, kits and devices for separating phospholipids and proteins from small molecules in biochemical samples can feature an apparatus having a wetting barrier, at least one frit and a separation media. For example, an apparatus can include at least one wall defining a chamber having an exit and an entrance; a wetting barrier disposed between the exit and entrance, so as to define a separation media space located between the wetting barrier and the exit and a sample receiving area located between the wetting barrier and the entrance; and a separation media disposed adjacent to the wetting barrier and having a specific affinity for phospholipids.Type: ApplicationFiled: March 30, 2018Publication date: October 11, 2018Inventors: Pamela C. Iraneta, Thomas H. Walter, Xin Zhang, Daniel P. Walsh, Kevin D. Wyndham, Raymond P. Fisk
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Patent number: 9951092Abstract: Methods, kits and devices for separating phospholipids and proteins from small molecules in biochemical samples can feature an apparatus having a wetting barrier, at least one fit and a separation media. For example, an apparatus can include at least one wall defining a chamber having an exit and an entrance; a wetting barrier disposed between the exit and entrance, so as to define a separation media space located between the wetting barrier and the exit and a sample receiving area located between the wetting barrier and the entrance; and a separation media disposed adjacent to the wetting barrier and having a specific affinity for phospholipids.Type: GrantFiled: May 20, 2011Date of Patent: April 24, 2018Assignee: Waters Technologies CorporationInventors: Pamela C. Iraneta, Thomas H. Walter, Xin Zhang, Daniel P. Walsh, Kevin D. Wyndham, Raymond P. Fisk
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Patent number: 9417977Abstract: In one embodiment the present invention includes a system for transaction recovery in a distributed computing environment. The system includes a transaction log server, application servers, and resource servers. The transaction log server stores a shared transaction log. The application servers implement a distributed transaction application and accesses the shared transaction log when performing a transaction using the distributed transaction application. The resource servers store data and that operate with the application servers to access the data according to the transaction. If one of the application servers fails, another application server assumes responsibility for a portion of the shared transaction log that was previously accessed by the failed application server.Type: GrantFiled: December 31, 2008Date of Patent: August 16, 2016Assignee: SAP SEInventors: Thomas H. Walter, Ralf Kuersch, Nikolai D. Tankov, Peter H. Peshev
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Patent number: 9089836Abstract: Novel materials for chromatographic separations, processes for their preparation, and separation devices containing the chromatographic materials. In particular, the novel materials are porous inorganic/organic hybrid monolith materials, which desirably may be surface modified, and which offer more efficient chromatographic separations than that known in the art.Type: GrantFiled: March 25, 2013Date of Patent: July 28, 2015Assignee: Waters Technologies CorporationInventors: Thomas H. Walter, Julia Ding, Marianna Kele, John E. O'Gara, Pamela C. Iraneta
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Patent number: 8845892Abstract: Embodiments of the present invention are directed to devices, methods and apparatus for performing separations in which particulates are separated or removed from a fluid stream flowing to a column. In one embodiment directed to a device, the invention includes a body (13) having a first surface (17) and a second surface (19) and at least one wall (23). At least one of the first surface (17) and second surface (19) is for receiving in sealing engagement a first conduit means. The remaining first surface (17) or second surface (19) is for engaging a column or a second conduit (19). The at least one wall (23) extends between the first surface (17) and the second surface (19). The body (13) has at least one opening (25) extending from the first surface (17) to the second surface (19) defining a chamber for receiving a solid phase separation media assembly (15).Type: GrantFiled: August 17, 2005Date of Patent: September 30, 2014Assignee: Waters Technologies CorporationInventors: Christopher C. Benevides, Jonathan L. Belanger, Marianna Kele, Thomas H. Walter, Raymond P. Fisk
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Publication number: 20140284259Abstract: Novel material for chromatographic separations, processes for its preparation, and separations devices containing the chromatographic material. In particular, the disclosure describes porous inorganic/organic hybrid particles having a chromatographically-enhancing pore geometry, which desirably may be surface modified, and that offer more efficient chromatographic separations than that known in the art.Type: ApplicationFiled: June 3, 2014Publication date: September 25, 2014Applicant: Waters Technologies CorporationInventors: Zhiping Jiang, Raymond P. Fisk, John E. O'Gara, Thomas H. Walter, Kevin D. Wyndham