Patents by Inventor Huashi Zhang
Huashi Zhang 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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Publication number: 20140343386Abstract: Described here are embodiments of processes and systems for the continuous manufacturing of implantable continuous analyte sensors. In some embodiments, a method is provided for sequentially advancing an elongated conductive body through a plurality of stations, each configured to treat the elongated conductive body. In some of these embodiments, one or more of the stations is configured to coat the elongated conductive body using a meniscus coating process, whereby a solution formed of a polymer and a solvent is prepared, the solution is continuously circulated to provide a meniscus on a top portion of a vessel holding the solution, and the elongated conductive body is advanced through the meniscus. The method may also comprise the step of removing excess coating material from the elongated conductive body by advancing the elongated conductive body through a die orifice.Type: ApplicationFiled: August 4, 2014Publication date: November 20, 2014Inventors: Robert J. Boock, Jeff Jackson, Huashi Zhang, Jason Mitchell
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Publication number: 20140275896Abstract: Devices are presented for measurement of an analyte concentration. The devices comprise: a sensor configured to generate a signal indicative of a concentration of an analyte; and a sensing membrane located over the sensor. The sensing membrane comprises an enzyme domain comprising an enzyme, a base polymer, and a hydrophilic polymer which makes up from about 5 wt. % to about 30 wt. % of the enzyme domain.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: DexCom, Inc.Inventors: Jonathan Hughes, Robert J. Boock, Chris W. Dring, Huashi Zhang, Mark Wu, David Sze
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Publication number: 20140148666Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: ApplicationFiled: January 30, 2014Publication date: May 29, 2014Applicant: DexCom, Inc.Inventors: Robert Boock, Monica Rixman Swinney, Huashi Zhang, Michael J. Estes, Kristina Lawrence
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Publication number: 20140148667Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: ApplicationFiled: January 30, 2014Publication date: May 29, 2014Applicant: DexCom, Inc.Inventors: Robert Boock, Monica Rixman Swinney, Huashi Zhang, Michael J. Estes, Kristina Lawrence
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Publication number: 20140123893Abstract: Described here are embodiments of processes and systems for the continuous manufacturing of implantable continuous analyte sensors. In some embodiments, a method is provided for sequentially advancing an elongated conductive body through a plurality of stations, each configured to treat the elongated conductive body. In some of these embodiments, one or more of the stations is configured to coat the elongated conductive body using a meniscus coating process, whereby a solution formed of a polymer and a solvent is prepared, the solution is continuously circulated to provide a meniscus on a top portion of a vessel holding the solution, and the elongated conductive body is advanced through the meniscus. The method may also comprise the step of removing excess coating material from the elongated conductive body by advancing the elongated conductive body through a die orifice.Type: ApplicationFiled: January 15, 2014Publication date: May 8, 2014Applicant: DexCom, Inc.Inventors: Robert Boock, Jeff Jackson, Huashi Zhang, Jason Mitchell
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Publication number: 20140088389Abstract: In one embodiment, a continuous analyte sensor having more than one working electrode, and configured to reduce or eliminate crosstalk between the working electrodes. In another embodiment, a continuous analyte sensor having more than one working electrode, and configured so that a membrane system has equal thicknesses over each of the electrodes, despite having differing numbers of layers over each of the electrodes. In another embodiment, a configuration for connecting a continuous analyte sensor to sensor electronics. In another embodiment, methods for forming precise windows in an insulator material on a multi-electrode assembly. In another embodiment, a contact assembly for a continuous analyte sensor having more than one working electrode.Type: ApplicationFiled: March 7, 2013Publication date: March 27, 2014Applicant: DexCom, Inc.Inventors: Peter C. Simpson, Sebastian Bohm, Robert J. Boock, Matthew D. Wightlin, Huashi Zhang
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Patent number: 8682408Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: GrantFiled: March 5, 2010Date of Patent: March 25, 2014Assignee: DexCom, Inc.Inventors: Robert Boock, Monica A. Rixman, Huashi Zhang, Michael J. Estes, Kristina Lawrence
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Publication number: 20140046158Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: ApplicationFiled: October 18, 2013Publication date: February 13, 2014Applicant: DexCom, Inc.Inventors: Robert J. Boock, Monica A. Rixman, Huashi Zhang, Michael J. Estes, Kristina Lawrence
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Patent number: 8583204Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: GrantFiled: March 5, 2010Date of Patent: November 12, 2013Assignee: DexCom, Inc.Inventors: Robert Boock, Monica A. Rixman, Huashi Zhang, Michael J. Estes, Kristina Lawrence
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Patent number: 8445007Abstract: The present invention provides biodegradable, biocompatible bis-(?-amino acyl)-diol-diester-containing poly(ester amide) (PEA) and poly(ester urethane) (PEUR) co-polymer compositions with mechanical properties that can be readily tailored by selection of various combinations and proportions of the building blocks of the co-polymers. The compositions are suitable for use in production of drug-releasing biodegradable particles and implantable surgical devices, such as stents and internal fixation devices. The co-polymer compositions, particles and surgical devices biodegrade in vivo by enzymatic action to release bioactive agents in a controlled manner over time as well as biocompatible breakdown products, including one to multiple different amino acids.Type: GrantFiled: September 22, 2006Date of Patent: May 21, 2013Assignee: Medivas, LLCInventors: Zaza D. Gomurashvili, Jonathan Macferran Hughes, Jie Da, Huashi Zhang
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Publication number: 20120282412Abstract: In preferred embodiments, the present invention relates to methods for polymerizing a monomer solution within a cavity covered by a porous membrane to generate a smooth polymer surface. More specifically, the method can be used to provide a medical device or sensor with a smooth polymer surface.Type: ApplicationFiled: January 4, 2012Publication date: November 8, 2012Inventors: David R. Markle, Huashi Zhang, Matthew A. Romey, Ritchie A. Wessling
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Patent number: 8110251Abstract: In preferred embodiments, the present invention relates to methods for polymerizing a monomer solution within a cavity covered by a porous membrane to generate a smooth polymer surface. More specifically, the method can be used to provide a medical device or sensor with a smooth polymer surface.Type: GrantFiled: February 5, 2008Date of Patent: February 7, 2012Assignee: Glumetrics, Inc.Inventors: David R. Markle, Huashi Zhang, Matthew A. Romey, Ritchie A. Wessling
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Publication number: 20110027453Abstract: Described here are embodiments of processes and systems for the continuous manufacturing of implantable continuous analyte sensors. In some embodiments, a method is provided for sequentially advancing an elongated conductive body through a plurality of stations, each configured to treat the elongated conductive body. In some of these embodiments, one or more of the stations is configured to coat the elongated conductive body using a meniscus coating process, whereby a solution formed of a polymer and a solvent is prepared, the solution is continuously circulated to provide a meniscus on a top portion of a vessel holding the solution, and the elongated conductive body is advanced through the meniscus. The method may also comprise the step of removing excess coating material from the elongated conductive body by advancing the elongated conductive body through a die orifice.Type: ApplicationFiled: July 1, 2010Publication date: February 3, 2011Applicant: DexCom, Inc.Inventors: Robert Boock, Jeff Jackson, Huashi Zhang, Jason Mitchell
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Publication number: 20110027458Abstract: Described here are embodiments of processes and systems for the continuous manufacturing of implantable continuous analyte sensors. In some embodiments, a method is provided for sequentially advancing an elongated conductive body through a plurality of stations, each configured to treat the elongated conductive body. In some of these embodiments, one or more of the stations is configured to coat the elongated conductive body using a meniscus coating process, whereby a solution formed of a polymer and a solvent is prepared, the solution is continuously circulated to provide a meniscus on a top portion of a vessel holding the solution, and the elongated conductive body is advanced through the meniscus. The method may also comprise the step of removing excess coating material from the elongated conductive body by advancing the elongated conductive body through a die orifice.Type: ApplicationFiled: July 1, 2010Publication date: February 3, 2011Applicant: DexCom, Inc.Inventors: Robert Boock, Jeff Jackson, Huashi Zhang, Jason Mitchell
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Publication number: 20110024043Abstract: Described here are embodiments of processes and systems for the continuous manufacturing of implantable continuous analyte sensors. In some embodiments, a method is provided for sequentially advancing an elongated conductive body through a plurality of stations, each configured to treat the elongated conductive body. In some of these embodiments, one or more of the stations is configured to coat the elongated conductive body using a meniscus coating process, whereby a solution formed of a polymer and a solvent is prepared, the solution is continuously circulated to provide a meniscus on a top portion of a vessel holding the solution, and the elongated conductive body is advanced through the meniscus. The method may also comprise the step of removing excess coating material from the elongated conductive body by advancing the elongated conductive body through a die orifice.Type: ApplicationFiled: July 1, 2010Publication date: February 3, 2011Applicant: DexCom, Inc.Inventors: Robert Boock, Jeff Jackson, Huashi Zhang, Jason Mitchell
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Publication number: 20100280341Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: ApplicationFiled: March 5, 2010Publication date: November 4, 2010Applicant: DexCom, Inc.Inventors: Robert Boock, Monica A. Rixman, Huashi Zhang, Michael J. Estes, Kristina Lawrence
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Publication number: 20100274107Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: ApplicationFiled: March 5, 2010Publication date: October 28, 2010Applicant: DexCom, Inc.Inventors: Robert Boock, Monica A. Rixman, Huashi Zhang, Michael J. Estes, Kristina Lawrence
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Publication number: 20100096259Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: ApplicationFiled: November 30, 2009Publication date: April 22, 2010Applicant: DexCom, Inc.Inventors: Huashi Zhang, Robert Boock
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Publication number: 20090247855Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Applicant: DexCom, Inc.Inventors: Robert Boock, Monica A. Rixman, Huashi Zhang, Michael J. Estes, Kristina Lawrence
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Publication number: 20090247856Abstract: Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Applicant: DexCom, Inc.Inventors: Robert Boock, Monica A. Rixman, Huashi Zhang, Michael J. Estes, Kristina Lawrence