Patents by Inventor Kiem Dang
Kiem Dang 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: 20190336078Abstract: An adhesive patch for a medical device having a hub, such as an infusion device, is provided. The adhesive patch includes a first backing layer to be coupled to the medical device. The first backing layer is composed of a first material. The adhesive patch includes a first adhesive layer coupled to the first backing layer and a second backing layer coupled to the first adhesive layer. The second backing layer is composed of a second material, and the second material is different than the first material. The adhesive patch includes a biocompatible second adhesive layer coupled to the second backing layer, and the second adhesive layer is to be coupled to an anatomy.Type: ApplicationFiled: May 1, 2019Publication date: November 7, 2019Inventors: Kiem Dang, Sarnath Chattaraj, Hsi C. Fusselman, Guangping Zhang
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Patent number: 10194864Abstract: The present invention describes improved systems and methods for attaching external medical devices to the body of a patient using a multilayer attachment apparatus. Medical devices that require attachment to the body, including monitoring devices, drug-infusing devices and the like, can utilize embodiments of the attachment apparatus and method described herein. Embodiments of the invention include new adhesive and hook and loop attachment mechanisms and methods for using embodiments of the multilayer attachment apparatus to attach medical device and/or medical device components to the body.Type: GrantFiled: June 21, 2013Date of Patent: February 5, 2019Assignee: Medtronic MiniMed, Inc.Inventors: Sarnath Chattaraj, Kiem Dang, Poonam S. Gulati, James Shallenberger
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Patent number: 9265890Abstract: Syringe pistons for a fluid syringe, and related sealing elements, are presented here. A syringe piston includes a piston body having a fluid end, an actuator end, and an outer seal-retaining surface between the fluid end and the actuator end. The syringe piston may utilize a piston sealing sleeve or a piston sealing cover. The sleeve can be coupled to the piston body around the outer seal-retaining surface, the piston sealing sleeve having a fin-shaped fluid seal element to form an interference fluid seal with an interior wall of a syringe barrel. The sealing cover can be coupled overlying the tip of the piston body. The cover has a fin-shaped fluid seal element to form an interference fluid seal with an interior wall of a syringe barrel.Type: GrantFiled: March 8, 2012Date of Patent: February 23, 2016Assignee: Medtronic MiniMed, Inc.Inventors: Sarnath Chattaraj, Poonam S. Gulati, Kiem Dang, Jocelyn Anne Montebon
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Patent number: 9199043Abstract: A fluid syringe of the type used with fluid infusion devices is presented here. The fluid syringe generally includes a barrel, a piston, and a check valve seal. The barrel has an interior wall and a sealed main fluid chamber. The piston is slidably coupled within the barrel, and the piston has a piston seal forming an interference fluid seal against the interior wall. The check valve seal is coupled to the piston, and it is located between the piston seal and the main fluid chamber. The check valve seal forms an interference fluid seal against the interior wall when the piston is unloaded, and it disengages the interior wall to allow gas flow from the main fluid chamber toward the piston seal when the piston is loaded.Type: GrantFiled: September 30, 2013Date of Patent: December 1, 2015Assignee: Medtronic MiniMed, Inc.Inventors: Sarnath Chattaraj, Poonam S. Gulati, Lance P. Hoffman, Kiem Dang
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Publication number: 20140378799Abstract: The present invention describes improved systems and methods for attaching external medical devices to the body of a patient using a multilayer attachment apparatus. Medical devices that require attachment to the body, including monitoring devices, drug-infusing devices and the like, can utilize embodiments of the attachment apparatus and method described herein. Embodiments of the invention include new adhesive and hook and loop attachment mechanisms and methods for using embodiments of the multilayer attachment apparatus to attach medical device and/or medical device components to the body.Type: ApplicationFiled: June 21, 2013Publication date: December 25, 2014Inventors: Sarnath Chattaraj, Kiem Dang, Poonam S. Gulati, James Shallenberger
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Publication number: 20140031749Abstract: A fluid syringe of the type used with fluid infusion devices is presented here. The fluid syringe generally includes a barrel, a piston, and a check valve seal. The barrel has an interior wall and a sealed main fluid chamber. The piston is slidably coupled within the barrel, and the piston has a piston seal forming an interference fluid seal against the interior wall. The check valve seal is coupled to the piston, and it is located between the piston seal and the main fluid chamber. The check valve seal forms an interference fluid seal against the interior wall when the piston is unloaded, and it disengages the interior wall to allow gas flow from the main fluid chamber toward the piston seal when the piston is loaded.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: MEDTRONIC MINIMED, INC.Inventors: Sarnath Chattaraj, Poonam S. Gulati, Lance P. Hoffman, Kiem Dang
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Patent number: 8574201Abstract: A fluid syringe of the type used with fluid infusion devices is presented here. The fluid syringe generally includes a barrel, a piston, and a check valve seal. The barrel has an interior wall and a sealed main fluid chamber. The piston is slidably coupled within the barrel, and the piston has a piston seal forming an interference fluid seal against the interior wall. The check valve seal is coupled to the piston, and it is located between the piston seal and the main fluid chamber. The check valve seal forms an interference fluid seal against the interior wall when the piston is unloaded, and it disengages the interior wall to allow gas flow from the main fluid chamber toward the piston seal when the piston is loaded.Type: GrantFiled: December 17, 2010Date of Patent: November 5, 2013Assignee: Medtronic Minimed, Inc.Inventors: Sarnath Chattaraj, Poonam S. Gulati, Lance P. Hoffman, Kiem Dang
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Publication number: 20120165754Abstract: Syringe pistons for a fluid syringe, and related sealing elements, are presented here. A syringe piston includes a piston body having a fluid end, an actuator end, and an outer seal-retaining surface between the fluid end and the actuator end. The syringe piston may utilize a piston sealing sleeve or a piston sealing cover. The sleeve can be coupled to the piston body around the outer seal-retaining surface, the piston sealing sleeve having a fin-shaped fluid seal element to form an interference fluid seal with an interior wall of a syringe barrel. The sealing cover can be coupled overlying the tip of the piston body. The cover has a fin-shaped fluid seal element to form an interference fluid seal with an interior wall of a syringe barrel.Type: ApplicationFiled: March 8, 2012Publication date: June 28, 2012Applicant: MEDTRONIC MINIMED, INC.Inventors: Sarnath CHATTARAJ, Poonam S. GULATI, Kiem DANG, Jocelyn Anne MONTEBON
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Publication number: 20120165755Abstract: Syringe pistons for a fluid syringe, and related sealing elements, are presented here. A syringe piston includes a piston body having a fluid end, an actuator end, and an outer seal-retaining surface between the fluid end and the actuator end. The syringe piston may utilize a piston sealing sleeve or a piston sealing cover. The sleeve can be coupled to the piston body around the outer seal-retaining surface, the piston sealing sleeve having a fin-shaped fluid seal element to form an interference fluid seal with an interior wall of a syringe barrel. The sealing cover can be coupled overlying the tip of the piston body. The cover has a fin-shaped fluid seal element to form an interference fluid seal with an interior wall of a syringe barrel.Type: ApplicationFiled: March 8, 2012Publication date: June 28, 2012Applicant: MEDTRONIC MINIMED, INC.Inventors: Sarnath CHATTARAJ, Poonam S. GULATI, Kiem DANG, Jocelyn Anne MONTEBON
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Publication number: 20110152820Abstract: The invention relates to methods and materials that, for example, function to increase the barrier properties of containers including polymeric drug medication reservoirs and related containers such as infusion set tubing. Embodiments of the invention include aqueous container systems having containers coated with a composition selected to have one or more material properties including an ability to reduce the diffusion or permeation of compounds such as oxygen, carbon dioxide, and preservatives (e.g. phenol, benzyl alcohol and m-cresol) into or through a wall of the container.Type: ApplicationFiled: December 21, 2010Publication date: June 23, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: Sarnath Chattaraj, Kiem Dang, Poonam S. Gulati
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Publication number: 20110152785Abstract: A fluid syringe of the type used with fluid infusion devices is presented here. The fluid syringe generally includes a barrel, a piston, and a check valve seal. The barrel has an interior wall and a sealed main fluid chamber. The piston is slidably coupled within the barrel, and the piston has a piston seal forming an interference fluid seal against the interior wall. The check valve seal is coupled to the piston, and it is located between the piston seal and the main fluid chamber. The check valve seal forms an interference fluid seal against the interior wall when the piston is unloaded, and it disengages the interior wall to allow gas flow from the main fluid chamber toward the piston seal when the piston is loaded.Type: ApplicationFiled: December 17, 2010Publication date: June 23, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: Sarnath CHATTARAJ, Poonam S. GULATI, Lance P. HOFFMAN, Kiem DANG
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Patent number: 7065394Abstract: A guide catheter has properties that promote enhanced visibility of the guide catheter using fluoroscopic or ultrasonic imaging techniques. The tip of the guide catheter may incorporate a material that is both fluoro and echo visible. The first material also may be provided in various amounts along the length of the guide catheter. In addition, the guide catheter may incorporate a reinforcing braid that includes one or more strands of a second material that is radio-opaque. As a result, the result guide catheter achieves improved radio-opacity and echogenicity.Type: GrantFiled: December 12, 2001Date of Patent: June 20, 2006Assignee: Medtronic, IncInventors: Christopher M. Hobot, Stanten C. Spear, James F. Kelley, Jennifer L. Braunschweig, Kiem Dang, Kenneth C. Gardeski
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Publication number: 20060041296Abstract: A medical electrode includes an active surface extending from a first end to a second end and has a maximum outer diameter exceeding an outer diameter of the both the first end and the second end. The electrode further includes a recess formed in the active surface and an agent held in the recess and adapted to disperse out from the recess upon implantation of the electrode.Type: ApplicationFiled: August 23, 2004Publication date: February 23, 2006Inventors: Ryan Bauer, Kiem Dang, John Sommer
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Publication number: 20060041297Abstract: A lumen seal of a medical electrical lead includes an outer surface adapted to form a portion of an exterior surface of the medical electrical lead and an inner surface adapted to seal off a lumen of the lead and yet allow passage of an elongate member that is slidably engaged within the lumen of the lead. The seal further includes a portion in which an agent is embedded, the agent adapted to disperse from the portion out through the outer surface of the seal.Type: ApplicationFiled: August 23, 2004Publication date: February 23, 2006Inventors: Ryan Bauer, Kiem Dang, John Sommer
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Publication number: 20050064005Abstract: An active agent delivery system that includes two or more active agents and two or more layers of polymers; wherein at least one layer includes miscible polymer blend comprising two or more miscible polymers; and further wherein delivery of at least one active agent occurs predominantly under permeation control.Type: ApplicationFiled: August 11, 2004Publication date: March 24, 2005Inventors: Thomas Dinh, Randall Sparer, SuPing Lyu, Kiem Dang, Christopher Hobot
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Publication number: 20050064038Abstract: An active agent delivery system that includes two or more active agents in a layer of a miscible polymer blend having at least two miscible polymers; wherein delivery of at least one of the active agents occurs predominantly under permeation control; and further wherein the permeability of the active agent that is to be released faster is greater than the permeability of the other one or more active agents.Type: ApplicationFiled: August 11, 2004Publication date: March 24, 2005Inventors: Thomas Dinh, Randall Sparer, SuPing Lyu, Kiem Dang, Christopher Hobot
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Publication number: 20040127978Abstract: The present invention provides active agent delivery systems for use in medical devices, wherein the active agent delivery systems include an active agent and a hydrophilic miscible polymer blend that includes an active agent and a miscible polymer blend comprising a hydrophilic polymer (preferably, a polyurethane) and a second polymer having a different swellability in water at 37° C.Type: ApplicationFiled: August 13, 2003Publication date: July 1, 2004Applicant: Medtronic, Inc.Inventors: Randall V. Sparer, Christopher M. Hobot, SuPing Lyu, Kiem Dang
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Publication number: 20040115273Abstract: The present invention provides active agent delivery systems for use in medical devices, wherein the active agent delivery systems include an active agent and a miscible polymer blend that includes a hydrophobic cellulose derivative and a polyvinyl homopolymer or copolymer selected from the group consisting of a polyvinyl alkylate homopolymer or copolymer, a polyvinyl alkyl ether homopolymer or copolymer, a polyvinyl acetal homopolymer or copolymer, and combinations thereof.Type: ApplicationFiled: August 13, 2003Publication date: June 17, 2004Applicant: Medtronic, Inc.Inventors: Randall V. Sparer, Christopher M. Hobot, SuPing Lyu, Kiem Dang, Peiwen Cheng
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Publication number: 20040047911Abstract: The present invention provides active agent delivery systems for use in medical devices, wherein the active agent delivery systems include an active agent and a miscible polymer blend that includes a poly(ethylene-co-(meth)acrylate) and a second polymer not including poly(ethylene vinyl acetate).Type: ApplicationFiled: August 13, 2003Publication date: March 11, 2004Applicant: Medtronic, Inc.Inventors: SuPing Lyu, Randall V. Sparer, Christopher M. Hobot, Kiem Dang
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Publication number: 20040033251Abstract: The present invention provides active agent delivery systems for use in medical devices, wherein the active agent delivery systems include an active agent and a miscible polymer blend that includes a polyurethane and a second polymer, preferably one that has at least one Tg equal to or higher than all Tg's of the polyurethane.Type: ApplicationFiled: August 13, 2003Publication date: February 19, 2004Applicant: Medtronic, Inc.Inventors: Randall V. Sparer, Christopher M. Hobot, SuPing Lyu, Kiem Dang