Patents by Inventor David J. Roach

David J. Roach 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).

  • Publication number: 20260092892
    Abstract: Some embodiments described herein relate to capillary-containing cartridges suitable for use with capillary electrophoresis instruments. Embodiments described herein generally relate to cartridges that include a transfer capillary coupled to a separation capillary. The transfer capillary can be configured to be disposed in sample reservoirs and/or buffer reservoirs. Suction applied through a sheath interface of the transfer capillary and the separation capillary can draw sample/buffer from such reservoirs and bring the sample/buffer into contact with the separation capillary. The separation capillary can be configured for separation of analytes contained within the sample, for example when an electric potential (i.e., voltage) is applied across the separation capillary.
    Type: Application
    Filed: December 9, 2025
    Publication date: April 2, 2026
    Inventors: Roland Y. WANG, Philip H. CHAO, Allen R. BORONKAY, David J. ROACH, Hui XU, Joshua I. MOLHO, Tom Weisan YANG
  • Patent number: 12540920
    Abstract: Some embodiments described herein relate to capillary-containing cartridges suitable for use with capillary electrophoresis instruments. Embodiments described herein generally relate to cartridges that include a transfer capillary coupled to a separation capillary. The transfer capillary can be configured to be disposed in sample reservoirs and/or buffer reservoirs. Suction applied through a sheath interface of the transfer capillary and the separation capillary can draw sample/buffer from such reservoirs and bring the sample/buffer into contact with the separation capillary. The separation capillary can be configured for separation of analytes contained within the sample, for example when an electric potential (i.e., voltage) is applied across the separation capillary.
    Type: Grant
    Filed: September 1, 2023
    Date of Patent: February 3, 2026
    Assignee: ProteinSimple
    Inventors: Roland Y. Wang, Philip H. Chao, Allen R. Boronkay, David J. Roach, Hui Xu, Joshua I. Molho, Tom Weisan Yang
  • Publication number: 20250339855
    Abstract: Embodiments include systems, apparatuses, and methods to efficiently separate analytes in a sample and elute fractions of the separated analytes. In some embodiments, a method includes introducing a sample in a capillary with a first end ionically coupled to a first running buffer and a second end ionically coupled to a second running buffer to form a pH gradient. The method includes applying a voltage between the first running buffer and the second running buffer, to separate a plurality of analytes in the sample. The method includes disposing the second end of the capillary in a collection well including a chemical mobilizer and applying a voltage to elute one or more analytes from the plurality of analytes in the sample, that have been separated, into the collection well. Embodiments include detection methods to monitor separation of analytes, mobilization of analytes, and/or elution of fractions containing analytes.
    Type: Application
    Filed: July 9, 2025
    Publication date: November 6, 2025
    Inventors: Cheng ZHOU, Hui XU, Roland Y. WANG, David J. ROACH, Jessica DERMODY, Tom Weisan YANG, Jiaqi WU
  • Patent number: 12383896
    Abstract: Embodiments include systems, apparatuses, and methods to efficiently separate analytes in a sample and elute fractions of the separated analytes. In some embodiments, a method includes introducing a sample in a capillary with a first end ionically coupled to a first running buffer and a second end ionically coupled to a second running buffer to form a pH gradient. The method includes applying a voltage between the first running buffer and the second running buffer, to separate a plurality of analytes in the sample. The method includes disposing the second end of the capillary in a collection well including a chemical mobilizer and applying a voltage to elute one or more analytes from the plurality of analytes in the sample, that have been separated, into the collection well. Embodiments include detection methods to monitor separation of analytes, mobilization of analytes, and/or elution of fractions containing analytes.
    Type: Grant
    Filed: June 4, 2024
    Date of Patent: August 12, 2025
    Assignee: ProteinSimple
    Inventors: Cheng Zhou, Hui Xu, Roland Y. Wang, David J. Roach, Jessica Dermody, Tom Weisan Yang, Jiaqi Wu
  • Publication number: 20250208094
    Abstract: A system includes a housing, a cartridge retainer disposed within the housing, a detection assembly disposed within the housing, and a reagent tray holder movably disposed in the housing. The cartridge retainer configured to receive a capillary cartridge having a capillary. The detection assembly includes at least one emitter, a first detector, and a second detector. The detection assembly is configured to transition between a first configuration, in which the first detector detects a first output of the at least one emitter, and a second configuration, in which the second detector detects a second output of the at least one emitter. The reagent tray holder is configured to move relative to the cartridge retainer to place the capillary of the capillary cartridge in fluid communication with a reagent volume.
    Type: Application
    Filed: December 24, 2024
    Publication date: June 26, 2025
    Applicant: ProteinSimple
    Inventors: David J. ROACH, Tom Weisan YANG, Hui XU
  • Patent number: 12216082
    Abstract: A system includes a housing, a cartridge retainer disposed within the housing, a detection assembly disposed within the housing, and a reagent tray holder movably disposed in the housing. The cartridge retainer configured to receive a capillary cartridge having a capillary. The detection assembly includes at least one emitter, a first detector, and a second detector. The detection assembly is configured to transition between a first configuration, in which the first detector detects a first output of the at least one emitter, and a second configuration, in which the second detector detects a second output of the at least one emitter. The reagent tray holder is configured to move relative to the cartridge retainer to place the capillary of the capillary cartridge in fluid communication with a reagent volume.
    Type: Grant
    Filed: June 30, 2023
    Date of Patent: February 4, 2025
    Assignee: ProteinSimple
    Inventors: David J. Roach, Tom Weisan Yang, Hui Xu
  • Publication number: 20250033043
    Abstract: Embodiments include systems, apparatuses, and methods to efficiently separate analytes in a sample and elute fractions of the separated analytes. In some embodiments, a method includes introducing a sample in a capillary with a first end ionically coupled to a first running buffer and a second end ionically coupled to a second running buffer to form a pH gradient. The method includes applying a voltage between the first running buffer and the second running buffer, to separate a plurality of analytes in the sample. The method includes disposing the second end of the capillary in a collection well including a chemical mobilizer and applying a voltage to elute one or more analytes from the plurality of analytes in the sample, that have been separated, into the collection well. Embodiments include detection methods to monitor separation of analytes, mobilization of analytes, and/or elution of fractions containing analytes.
    Type: Application
    Filed: June 4, 2024
    Publication date: January 30, 2025
    Applicant: ProteinSimple
    Inventors: Cheng ZHOU, Hui XU, Roland Y. WANG, David J. ROACH, Jessica DERMODY, Tom Weisan YANG, Jiaqi WU
  • Patent number: 12023670
    Abstract: Embodiments include systems, apparatuses, and methods to efficiently separate analytes in a sample and elute fractions of the separated analytes. In some embodiments, a method includes introducing a sample in a capillary with a first end ionically coupled to a first running buffer and a second end ionically coupled to a second running buffer to form a pH gradient. The method includes applying a voltage between the first running buffer and the second running buffer, to separate a plurality of analytes in the sample. The method includes disposing the second end of the capillary in a collection well including a chemical mobilizer and applying a voltage to elute one or more analytes from the plurality of analytes in the sample, that have been separated, into the collection well. Embodiments include detection methods to monitor separation of analytes, mobilization of analytes, and/or elution of fractions containing analytes.
    Type: Grant
    Filed: July 21, 2022
    Date of Patent: July 2, 2024
    Assignee: ProteinSimple
    Inventors: Cheng Zhou, Hui Xu, Roland Y. Wang, David J. Roach, Jessica Dermody, Tom Weisan Yang, Jiaqi Wu
  • Publication number: 20240210352
    Abstract: Some embodiments described herein relate to capillary-containing cartridges suitable for use with capillary electrophoresis instruments. Embodiments described herein generally relate to cartridges that include a transfer capillary coupled to a separation capillary. The transfer capillary can be configured to be disposed in sample reservoirs and/or buffer reservoirs. Suction applied through a sheath interface of the transfer capillary and the separation capillary can draw sample/buffer from such reservoirs and bring the sample/buffer into contact with the separation capillary. The separation capillary can be configured for separation of analytes contained within the sample, for example when an electric potential (i.e., voltage) is applied across the separation capillary.
    Type: Application
    Filed: September 1, 2023
    Publication date: June 27, 2024
    Applicant: ProteinSimple
    Inventors: Roland Y. WANG, Philip H. CHAO, Allen R. BORONKAY, David J. ROACH, Hui XU, Joshua I. MOLHO, Tom Weisan YANG
  • Publication number: 20240183820
    Abstract: A system includes a housing, a cartridge retainer disposed within the housing, a detection assembly disposed within the housing, and a reagent tray holder movably disposed in the housing. The cartridge retainer configured to receive a capillary cartridge having a capillary. The detection assembly includes at least one emitter, a first detector, and a second detector. The detection assembly is configured to transition between a first configuration, in which the first detector detects a first output of the at least one emitter, and a second configuration, in which the second detector detects a second output of the at least one emitter. The reagent tray holder is configured to move relative to the cartridge retainer to place the capillary of the capillary cartridge in fluid communication with a reagent volume.
    Type: Application
    Filed: June 30, 2023
    Publication date: June 6, 2024
    Applicant: ProteinSimple
    Inventors: David J. ROACH, Tom Weisan YANG, Hui XU
  • Patent number: 11726058
    Abstract: A system includes a housing, a cartridge retainer disposed within the housing, a detection assembly disposed within the housing, and a reagent tray holder movably disposed in the housing. The cartridge retainer configured to receive a capillary cartridge having a capillary. The detection assembly includes at least one emitter, a first detector, and a second detector. The detection assembly is configured to transition between a first configuration, in which the first detector detects a first output of the at least one emitter, and a second configuration, in which the second detector detects a second output of the at least one emitter. The reagent tray holder is configured to move relative to the cartridge retainer to place the capillary of the capillary cartridge in fluid communication with a reagent volume.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: August 15, 2023
    Assignee: ProteinSimple
    Inventors: David J. Roach, Tom Weisan Yang, Hui Xu
  • Publication number: 20230062228
    Abstract: Embodiments include systems, apparatuses, and methods to efficiently separate analytes in a sample and elute fractions of the separated analytes. In some embodiments, a method includes introducing a sample in a capillary with a first end ionically coupled to a first running buffer and a second end ionically coupled to a second running buffer to form a pH gradient. The method includes applying a voltage between the first running buffer and the second running buffer, to separate a plurality of analytes in the sample. The method includes disposing the second end of the capillary in a collection well including a chemical mobilizer and applying a voltage to elute one or more analytes from the plurality of analytes in the sample, that have been separated, into the collection well. Embodiments include detection methods to monitor separation of analytes, mobilization of analytes, and/or elution of fractions containing analytes.
    Type: Application
    Filed: July 21, 2022
    Publication date: March 2, 2023
    Applicant: ProteinSimple
    Inventors: Cheng ZHOU, Hui XU, Roland Y. WANG, David J. ROACH, Jessica DERMODY, Tom Weisan YANG, Jiaqi WU
  • Patent number: 11420202
    Abstract: Embodiments include systems, apparatuses, and methods to efficiently separate analytes in a sample and elute fractions of the separated analytes. In some embodiments, a method includes introducing a sample in a capillary with a first end ionically coupled to a first running buffer and a second end ionically coupled to a second running buffer to form a pH gradient. The method includes applying a voltage between the first running buffer and the second running buffer, to separate a plurality of analytes in the sample. The method includes disposing the second end of the capillary in a collection well including a chemical mobilizer and applying a voltage to elute one or more analytes from the plurality of analytes in the sample, that have been separated, into the collection well. Embodiments include detection methods to monitor separation of analytes, mobilization of analytes, and/or elution of fractions containing analytes.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: August 23, 2022
    Assignee: ProteinSimple
    Inventors: Cheng Zhou, Hui Xu, Roland Y. Wang, David J. Roach, Jessica Dermody, Tom Weisan Yang, Jiaqi Wu
  • Publication number: 20210231607
    Abstract: A system includes a housing, a cartridge retainer disposed within the housing, a detection assembly disposed within the housing, and a reagent tray holder movably disposed in the housing. The cartridge retainer configured to receive a capillary cartridge having a capillary. The detection assembly includes at least one emitter, a first detector, and a second detector. The detection assembly is configured to transition between a first configuration, in which the first detector detects a first output of the at least one emitter, and a second configuration, in which the second detector detects a second output of the at least one emitter. The reagent tray holder is configured to move relative to the cartridge retainer to place the capillary of the capillary cartridge in fluid communication with a reagent volume.
    Type: Application
    Filed: October 5, 2020
    Publication date: July 29, 2021
    Applicant: ProteinSimple
    Inventors: David J. ROACH, Tom Weisan YANG, Hui XU
  • Patent number: 10794860
    Abstract: A system includes a housing, a cartridge retainer disposed within the housing, a detection assembly disposed within the housing, and a reagent tray holder movably disposed in the housing. The cartridge retainer configured to receive a capillary cartridge having a capillary. The detection assembly includes at least one emitter, a first detector, and a second detector. The detection assembly is configured to transition between a first configuration, in which the first detector detects a first output of the at least one emitter, and a second configuration, in which the second detector detects a second output of the at least one emitter. The reagent tray holder is configured to move relative to the cartridge retainer to place the capillary of the capillary cartridge in fluid communication with a reagent volume.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: October 6, 2020
    Assignee: ProteinSimple
    Inventors: David J. Roach, Tom Weisan Yang, Hui Xu
  • Publication number: 20180321189
    Abstract: A system includes a housing, a cartridge retainer disposed within the housing, a detection assembly disposed within the housing, and a reagent tray holder movably disposed in the housing. The cartridge retainer configured to receive a capillary cartridge having a capillary. The detection assembly includes at least one emitter, a first detector, and a second detector. The detection assembly is configured to transition between a first configuration, in which the first detector detects a first output of the at least one emitter, and a second configuration, in which the second detector detects a second output of the at least one emitter. The reagent tray holder is configured to move relative to the cartridge retainer to place the capillary of the capillary cartridge in fluid communication with a reagent volume.
    Type: Application
    Filed: July 12, 2018
    Publication date: November 8, 2018
    Applicant: ProteinSimple
    Inventors: David J. ROACH, Tom Weisan YANG, Hui XU
  • Patent number: 8940232
    Abstract: An automated assay system is described with stations for placement of materials to be used in an assay of materials inside capillaries and an automated gripper for manipulating capillaries. The system includes a separation and immobilization station where reactions inside the capillaries take place and a detector station where photoemissions from the capillary reactions are detected. The photoemissions from the capillaries may be displayed as line graphs or in columns of a pseudo-gel image resembling the familiar Western gel blot. An automated control system has a user interface by which an operator can select a run protocol and define the locations of samples and reagents to be used in the protocol run: Following the setup the control system will cause the automated system to execute the protocol, then display the results in a selected display format.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: January 27, 2015
    Assignee: ProteinSimple
    Inventors: David J. Roach, Tom W. Yang, Roger A. O'Neill, Robert T. Loder, Jr.
  • Publication number: 20120213667
    Abstract: An automated assay system is described with stations for placement of materials to be used in an assay of materials inside capillaries and an automated gripper for manipulating capillaries. The system includes a separation and immobilization station where reactions inside the capillaries take place and a detector station where photoemissions from the capillary reactions are detected. The photoemissions from the capillaries may be displayed as line graphs or in columns of a pseudo-gel image resembling the familiar Western gel blot. An automated control system has a user interface by which an operator can select a run protocol and define the locations of samples and reagents to be used in the protocol run. Following the setup the control system will cause the automated system to execute the protocol, then display the results in a selected display format.
    Type: Application
    Filed: September 19, 2011
    Publication date: August 23, 2012
    Applicant: ProteinSimple
    Inventors: David J. Roach, Tom W. Yang, Roger A. O'Neill, Robert T. Loder, JR., Peter B. Vander Horn
  • Patent number: 8021611
    Abstract: An automated assay system is described with stations for placement of materials to be used in an assay of materials inside capillaries and an automated gripper for manipulating capillaries. The system includes a separation and immobilization station where reactions inside the capillaries take place and a detector station where photoemissions from the capillary reactions are detected. The photoemissions from the capillaries may be displayed as line graphs or in columns of a pseudo-gel image resembling the familiar Western gel blot. An automated control system has a user interface by which an operator can select a run protocol and define the locations of samples and reagents to be used in the protocol run. Following the setup the control system will cause the automated system to execute the protocol, then display the results in a selected display format.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: September 20, 2011
    Assignee: ProteinSimple
    Inventors: David J. Roach, Tom W. Yang, Roger A. O'Neill, Robert T. Loder, Jr., Peter B. Vander Horn
  • Publication number: 20110011740
    Abstract: An automated assay system is described with stations for placement of materials to be used in an assay of materials inside capillaries and an automated gripper for manipulating capillaries. The system includes a separation/detection station where reactions inside the capillaries take place and photoemissions from the capillary reactions are detected. The photoemissions from the capillaries may be displayed as line graphs or in columns of a pseudo-gel image resembling the familiar Western gel blot. An automated control system has a user interface by which an operator can select a run protocol and define the locations of samples and reagents to be used in the protocol run. Following the setup the control system will cause the automated system to execute the protocol, then display the results in a selected display format.
    Type: Application
    Filed: April 19, 2010
    Publication date: January 20, 2011
    Inventors: David J. Roach, Tom W. Yang