Patents by Inventor Sarnath Chattaraj

Sarnath Chattaraj 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).

  • Patent number: 9199043
    Abstract: 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: Grant
    Filed: September 30, 2013
    Date of Patent: December 1, 2015
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Sarnath Chattaraj, Poonam S. Gulati, Lance P. Hoffman, Kiem Dang
  • Publication number: 20150112302
    Abstract: Methods and devices are provided for reducing a diabetic patient's foreign body immune response, including infusion site-loss and/or occlusion. Such foreign body responses are associated with the treatment of the diabetic patient where the treatment requires subcutaneous implantation of a foreign body, such as a cannula or catheter. In certain embodiments of the invention, a response-inhibiting agent is administered to a patient at the site of cannula/catheter insertion, thereby facilitating delivery of insulin to the diabetic patient and mitigating site-loss and/or occlusion over a period of time.
    Type: Application
    Filed: October 13, 2014
    Publication date: April 23, 2015
    Inventors: Sarnath Chattaraj, Kiem H. Dang, Hsi Chung Fusselman, Poonam S. Gulati, Lance P. Hoffman, Guangping Zhang
  • Publication number: 20140378799
    Abstract: 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: Application
    Filed: June 21, 2013
    Publication date: December 25, 2014
    Inventors: Sarnath Chattaraj, Kiem Dang, Poonam S. Gulati, James Shallenberger
  • Publication number: 20140031749
    Abstract: 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: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: MEDTRONIC MINIMED, INC.
    Inventors: Sarnath Chattaraj, Poonam S. Gulati, Lance P. Hoffman, Kiem Dang
  • Patent number: 8574201
    Abstract: 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: Grant
    Filed: December 17, 2010
    Date of Patent: November 5, 2013
    Assignee: Medtronic Minimed, Inc.
    Inventors: Sarnath Chattaraj, Poonam S. Gulati, Lance P. Hoffman, Kiem Dang
  • Patent number: 8497133
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: July 30, 2013
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Sarnath Chattaraj, Poonam S. Gulati, Eugene Levin
  • Patent number: 8372646
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: February 12, 2013
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Sarnath Chattaraj, Poonam S. Gulati, Eugene Levin
  • Publication number: 20120165755
    Abstract: 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: Application
    Filed: March 8, 2012
    Publication date: June 28, 2012
    Applicant: MEDTRONIC MINIMED, INC.
    Inventors: Sarnath CHATTARAJ, Poonam S. GULATI, Kiem DANG, Jocelyn Anne MONTEBON
  • Publication number: 20120165754
    Abstract: 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: Application
    Filed: March 8, 2012
    Publication date: June 28, 2012
    Applicant: MEDTRONIC MINIMED, INC.
    Inventors: Sarnath CHATTARAJ, Poonam S. GULATI, Kiem DANG, Jocelyn Anne MONTEBON
  • Patent number: 8097224
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. A related embodiment of the invention is an apparatus that is used for example to facilitate the practice of the above-noted methods by inhibiting the evaporation of dissolution media from the vessels in which elution is observed.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: January 17, 2012
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Sarnath Chattaraj, Elango S. Minnoor, Eugene Levin, Poonam S. Gulati, John Pennala
  • Publication number: 20110152785
    Abstract: 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: Application
    Filed: December 17, 2010
    Publication date: June 23, 2011
    Applicant: MEDTRONIC MINIMED, INC.
    Inventors: Sarnath CHATTARAJ, Poonam S. GULATI, Lance P. HOFFMAN, Kiem DANG
  • Publication number: 20110152820
    Abstract: 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: Application
    Filed: December 21, 2010
    Publication date: June 23, 2011
    Applicant: MEDTRONIC MINIMED, INC.
    Inventors: Sarnath Chattaraj, Kiem Dang, Poonam S. Gulati
  • Patent number: 7892840
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: February 22, 2011
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Sarnath Chattaraj, Elango Minnoor, Eugene Levin, Poonam S. Gulati
  • Patent number: 7790461
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: September 7, 2010
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Sarnath Chattaraj, Poonam S. Gulati, Eugene Levin, Elango S. Minnoor
  • Publication number: 20100162800
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 1, 2010
    Applicant: Medtronic MiniMed, Inc.
    Inventors: Sarnath Chattaraj, Elango Minnoor, Eugene Levin, Poonam S. Gulati
  • Publication number: 20100098595
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. A related embodiment of the invention is an apparatus that is used for example to facilitate the practice of the above-noted methods by inhibiting the evaporation of dissolution media from the vessels in which elution is observed.
    Type: Application
    Filed: December 21, 2009
    Publication date: April 22, 2010
    Applicant: MEDTRONIC MINIMED, INC.
    Inventors: Sarnath Chattaraj, Elango S. Minnoor, Eugene Levin, Poonam S. Gulati, John Pennala
  • Patent number: 7687268
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. A related embodiment of the invention is an apparatus that is used for example to facilitate the practice of the above-noted methods by inhibiting the evaporation of dissolution media from the vessels in which elution is observed.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: March 30, 2010
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Sarnath Chattaraj, Elango S. Minnoor, Eugene Levin, Poonam S. Gulati, John Pennala
  • Publication number: 20090169624
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Inventors: Sarnath Chattaraj, Poonam S. Gulati, Eugene Levin, Elango S. Minnoor
  • Publication number: 20090029472
    Abstract: Embodiments of the invention provide to apparatuses and media used in drug elution studies and methods for making and using them. Such methods and materials can be used for example to assess and control the manufacturing process variability of drug eluting implantable devices such as cardiac leads. One embodiment of the invention is a drug elution method that can be used for in-vitro studies of a matrix impregnated with a compound such as a drug blended polymer matrix. A related embodiment of the invention is an apparatus that is used for example to facilitate the practice of the above-noted methods by inhibiting the evaporation of dissolution media from the vessels in which elution is observed.
    Type: Application
    Filed: July 25, 2007
    Publication date: January 29, 2009
    Inventors: Sarnath Chattaraj, Elango S. Minnoor, Eugene Levin, Poonam S. Gulati, John Pennala
  • Publication number: 20080113443
    Abstract: Embodiments of the invention include polypeptide formulations and methods for making, using and characterizing them. Embodiment of the invention include stabilized polypeptide formulations, for example stable glucose oxidase formulations that can be used with glucose sensors used in the management of diabetes. Another embodiment of the invention includes methods to characterize the concentration of nonionic surfactants in stabilized polypeptide formulation for example stable insulin formulations that can be used in the treatment of diabetes.
    Type: Application
    Filed: May 25, 2007
    Publication date: May 15, 2008
    Inventors: Poonam S. Gulati, Sarnath Chattaraj, Elango S. Minnoor, Eugene Levin, Xiao Zhu, William P. Van Antwerp