Patents by Inventor Klearchos K. Papas

Klearchos K. Papas 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: 20230414134
    Abstract: An encapsulation device system for therapeutic applications such as but not limited to regulating blood glucose. The system may comprise an encapsulation device with a first oxygen sensor integrated inside the device and a second oxygen sensor disposed on an outer surface of the device, wherein the sensors allow for real-time measurements (such as oxygen levels) related to cells (e.g., islet cells, stem cell derived beta cells, etc.) housed in the encapsulation device. The system may also feature an exogenous oxygen delivery system operatively connected to the encapsulation device via a channel, wherein the exogenous oxygen delivery system is adapted to deliver oxygen to the encapsulation device.
    Type: Application
    Filed: July 24, 2023
    Publication date: December 28, 2023
    Applicant: Arizona Board of Regents on Behalf of the University of Arizona
    Inventor: Klearchos K. Papas
  • Publication number: 20230383231
    Abstract: Methods and systems for measuring viability and function of islet cells or stem cell-derived beta cells in an implantable device featuring setting the temperature of the cells in the implantable device to a low temperature to reduce metabolic levels of the cells and reduce oxygen requirements of the cells, and measuring oxygen consumption rates. An oxygen sensor at the inlet of the implantable device and an oxygen sensor at the outlet of the implantable device are used to calculate oxygen consumption rates of the cells, which in turn are indicative of viability. The reduction in temperature can also be used for loading cells into the implantable devices to help reduce ischemic and/or physical injury. The present invention may be used with other cell types, e.g. hepatocytes, heart cells, muscle cells, etc.
    Type: Application
    Filed: August 7, 2023
    Publication date: November 30, 2023
    Applicant: Arizona Board of Regents on Behalf of the University of Arizona
    Inventor: Klearchos K. Papas
  • Patent number: 11746318
    Abstract: Methods and systems for measuring viability and function of islet cells or stem cell-derived beta cells in an implantable device featuring setting the temperature of the cells in the implantable device to a low temperature to reduce metabolic levels of the cells and reduce oxygen requirements of the cells, and measuring oxygen consumption rates. An oxygen sensor at the inlet of the implantable device and an oxygen sensor at the outlet of the implantable device are used to calculate oxygen consumption rates of the cells, which in turn are indicative of viability. The reduction in temperature can also be used for loading cells into the implantable devices to help reduce ischemic and/or physical injury. The present invention may be used with other cell types, e.g. hepatocytes, heart cells, muscle cells, etc.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: September 5, 2023
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventor: Klearchos K. Papas
  • Patent number: 11723558
    Abstract: An encapsulation device system for therapeutic applications such as but not limited to regulating blood glucose. The system may comprise an encapsulation device with a first oxygen sensor integrated inside the device and a second oxygen sensor disposed on an outer surface of the device, wherein the sensors allow for real-time measurements (such as oxygen levels) related to cells (e.g., islet cells, stem cell derived beta cells, etc.) housed in the encapsulation device. The system may also feature an exogenous oxygen delivery system operatively connected to the encapsulation device via a channel, wherein the exogenous oxygen delivery system is adapted to deliver oxygen to the encapsulation device.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: August 15, 2023
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventor: Klearchos K. Papas
  • Publication number: 20230000612
    Abstract: Systems featuring two or more encapsulation devices stacked together. The encapsulation devices house cells, such as but not limited to islet cells or stem cell derived beta cells or the like. e.g., for regulating blood glucose, or other cells or spheroids that can produce and release a therapeutic agent that is useful in the body, etc. The system may feature oxygen delivery, or in some cases no exogenous oxygen is delivered and vascularization of the device can help provide oxygen and other needed nutrient to the cells. The system of the present invention may be used in conjunction with other therapies such as an artificial pancreas. Stacking the devices with blood vessel formation around and in between them may allow for a decrease in the footprint that would be needed for implantation.
    Type: Application
    Filed: September 2, 2022
    Publication date: January 5, 2023
    Inventor: Klearchos K. Papas
  • Patent number: 11446133
    Abstract: Systems featuring two or more encapsulation devices stacked together. The encapsulation devices house cells, such as but not limited to islet cells or stem cell derived beta cells or the like. e.g., for regulating blood glucose, or other cells or spheroids that can produce and release a therapeutic agent that is useful in the body, etc. The system may feature oxygen delivery, or in some cases no exogenous oxygen is delivered and vascularization of the device can help provide oxygen and other needed nutrient to the cells. The system of the present invention may be used in conjunction with other therapies such as an artificial pancreas. Stacking the devices with blood vessel formation around and in between them may allow for a decrease in the footprint that would be needed for implantation.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: September 20, 2022
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventor: Klearchos K. Papas
  • Publication number: 20210386333
    Abstract: Methods, systems, and devices for regulating blood glucose such as implantable encapsulated devices optionally with insulin and/or glucagon secreting cells in combination with glucose sensors and insulin infusion systems. For example, encapsulation devices may be connected to an insulin infusion pump for distribution of insulin. The insulin infusion pump may feature an insulin pouch fluidly connected to an insulin pump (or a syringe) and a glucose sensor separate from the encapsulation device. The system may feature an additional implantable device comprising insulin and glucagon secreting cells.
    Type: Application
    Filed: July 28, 2021
    Publication date: December 16, 2021
    Applicant: Arizona Board of Regents on Behalf of the University of Arizona
    Inventor: Klearchos K. Papas
  • Publication number: 20200281709
    Abstract: Systems featuring two or more encapsulation devices stacked together. The encapsulation devices house cells, such as but not limited to islet cells or stem cell derived beta cells or the like. e.g., for regulating blood glucose, or other cells or spheroids that can produce and release a therapeutic agent that is useful in the body, etc. The system may feature oxygen delivery, or in some cases no exogenous oxygen is delivered and vascularization of the device can help provide oxygen and other needed nutrient to the cells. The system of the present invention may be used in conjunction with other therapies such as an artificial pancreas. Stacking the devices with blood vessel formation around and in between them may allow for a decrease in the footprint that would be needed for implantation.
    Type: Application
    Filed: November 3, 2017
    Publication date: September 10, 2020
    Inventor: Klearchos K. Papas
  • Publication number: 20200063085
    Abstract: Methods and systems for measuring viability and function of islet cells or stem cell-derived beta cells in an implantable device featuring setting the temperature of the cells in the implantable device to a low temperature to reduce metabolic levels of the cells and reduce oxygen requirements of the cells, and measuring oxygen consumption rates. An oxygen sensor at the inlet of the implantable device and an oxygen sensor at the outlet of the implantable device are used to calculate oxygen consumption rates of the cells, which in turn are indicative of viability. The reduction in temperature can also be used for loading cells into the implantable devices to help reduce ischemic and/or physical injury. The present invention may be used with other cell types, e.g. hepatocytes, heart cells, muscle cells, etc.
    Type: Application
    Filed: November 3, 2017
    Publication date: February 27, 2020
    Inventor: Klearchos K. Papas
  • Publication number: 20200054257
    Abstract: Methods, systems, and devices for regulating blood glucose such as implantable encapsulated devices optionally with insulin and/or giucacon secreting cells in combination with glucose sensors and insulin infusion systems. For example, encapsulation devices may be connected to an insulin infusion pump for distribution of insulin. The insulin infusion pump may feature an insulin pouch fluidly connected to an insulin pump (or a syringe) and a glucose sensor separate from the encapsulation device. The system may feature an additional implantable device comprising insulin and glucagon secreting cells.
    Type: Application
    Filed: November 3, 2017
    Publication date: February 20, 2020
    Inventor: Klearchos K. Papas
  • Publication number: 20190328289
    Abstract: An encapsulation device system for therapeutic applications such as but not limited to regulating blood glucose. The system may comprise an encapsulation device with a first oxygen sensor integrated inside the device and a second oxygen sensor disposed on an outer surface of the device, wherein the sensors allow for real-time measurements (such as oxygen levels) related to cells (e.g., islet cells, stem cell derived beta cells, etc.) housed in the encapsulation device. The system may also feature an exogenous oxygen delivery system operatively connected to the encapsulation device via a channel, wherein the exogenous oxygen delivery system is adapted to deliver oxygen to the encapsulation device.
    Type: Application
    Filed: November 3, 2017
    Publication date: October 31, 2019
    Inventor: Klearchos K. Papas
  • Publication number: 20190224377
    Abstract: Methods, systems, and devices for enhancing cancer immunotherapy featuring co-transplantation of encapsulated xenogeneic cells with separately encapsulated autologous or allogeneic cells, e.g., autologous or allogeneic tumor cells. For example, both a first cellular transplantation device housing a patient's own tumor cells and a second cellular transplantation device housing xenogeneic cells may be implanted into a patient. The presence of the xenogeneic cells elicits an enhanced immune response, e.g., the xenogeneic cells will draw in a large number of immune cells. Shed tumor antigens from the first cellular transplantation may then be taken up by the immune cells that were drawn to the xenogeneic cells. This will generate an anti-tumor immune response that is amplified relative to a response elicited by the encapsulated tumor cells alone.
    Type: Application
    Filed: October 5, 2017
    Publication date: July 25, 2019
    Inventor: Klearchos K. Papas
  • Patent number: 10091985
    Abstract: Method and system for organ preservation. According to one aspect, an organ may be preserved by being perfused with an in situ generated preserving gas. The organ may be, for example, a human or porcine pancreas, and perfusion of the pancreas may be anterograde, retrograde, ductal, anterograde/ductal, or retrograde/ductal. The preserving gas used to perfuse the organ may be dissolved in a liquid and then administered to the organ as a gas/liquid solution or may be mixed with one or more other gases and then administered to the organ as a gas/gas mixture. The preserving gas may be, for example, oxygen gas generated in situ using an electrochemical oxygen concentrator. According to another aspect, an organ preservation system may include an electrochemical oxygen concentrator having a water vapor feed, as well as auxiliary equipment to control and measure delivery pressure, flow, temperature and humidity.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: October 9, 2018
    Assignee: GINER, INC.
    Inventors: Linda A. Tempelman, Klearchos K. Papas, Simon G. Stone, William Earl Scott, III, Thomas M. Suszynski, Shuichiro Matsumoto, Joana Ferrer Fabrega, Michael D. Rizzari
  • Publication number: 20100330547
    Abstract: Method and system for organ preservation. According to one aspect, an organ may be preserved by being perfused with an in situ generated preserving gas. The organ may be, for example, a human or porcine pancreas, and perfusion of the pancreas may be anterograde, retrograde, ductal, anterograde/ductal, or retrograde/ductal. The preserving gas used to perfuse the organ may be dissolved in a liquid and then administered to the organ as a gas/liquid solution or may be mixed with one or more other gases and then administered to the organ as a gas/gas mixture. The preserving gas may be, for example, oxygen gas generated in situ using an electrochemical oxygen concentrator. According to another aspect, an organ preservation system may include an electrochemical oxygen concentrator having a water vapor feed, as well as auxiliary equipment to control and measure delivery pressure, flow, temperature and humidity.
    Type: Application
    Filed: June 18, 2010
    Publication date: December 30, 2010
    Inventors: Linda A. Tempelman, Klearchos K. Papas, Simon G. Stone, William Earl Scott, III, Thomas M. Suszynski, Shuichiro Matsumoto, Joana Ferrer Fabrega, Michael D. Rizzari
  • Publication number: 20090272748
    Abstract: This invention relates to methods and devices that improve the process of culturing cells and/or shipping cells from one location to another. They have the capacity to reduce the risk of contamination, regulate pressure in the medium surrounding cells, and maintain cells in a uniform distribution throughout transit. This leads to an improved level of process control relative to current methods.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 5, 2009
    Inventors: Daniel P. Welch, John R. Wilson, Klearchos K. Papas, Efstathios S. Avgoustiniatos